2025

• Konferanseposter
  Baigarinova, Gulzhan; Nilsen, Tron Arne; Bhunia, Swagata; Weman, Helge; Fimland, Bjørn Ove Myking. (2025) Selective Area Growth of GaN Nanowires on Si with Ga Pre-Filling. 15th International Conference on Nitride Semiconductors (ICNS-15)
• Konferanseposter
  Baigarinova, Gulzhan; Nilsen, Tron Arne; Bhunia, Swagata; Weman, Helge; Fimland, Bjørn Ove Myking. (2025) Selective area growth of GaN nanowires. TNNN

2024

• Foredrag
  Weman, Helge. (2024) III-V nanowire/graphene hybrid structures for applications in solar cells and UV LEDs. Invited talk
• Konferanseforedrag
  Gupta, Dishiti; Nilsen, Tron Arne; Fimland, Bjørn Ove Myking; Weman, Helge. (2024) Improving the Efficiency of Top-emitting AlGaN Nanowire Photonic Crystal Laser by Structural Modification. NUSOD

2023

• Konferanseforedrag
  Weman, Helge. (2023) UV LEDs based on AlGaN nanowires grown on graphene. The 3rd Ultraviolet LED InternationalConference
• Konferanseposter
  Li, Yang; Nilsen, Tron Arne; Baigarinova, Gulzhan; Gupta, Dishiti; Ren, Dingding; Fimland, Bjørn Ove Myking; Weman, Helge. (2023) GaN nanowires grown on Si by plasma-assisted molecular beam epitaxy using graphene as buffer. 14th Int. Conf. on Nitride Semiconductors
• Konferanseforedrag
  Weman, Helge. (2023) III-V nanowire/graphene hybrid structures for applications in solar cells and UVC LEDs. Invited talk at EPFL
• Konferanseposter
  Li, Yang; Nilsen, Tron Arne; Baigarinova, Gulzhan; Gupta, Dishiti; Ren, Dingding; Fimland, Bjørn Ove Myking; Weman, Helge. (2023) Exploring graphene as buffer for gallium nitride nanowire growth on silicon. Norwegian NanoSymposium 2023
• Konferanseforedrag
  Nilsen, Julie Stene; Huh, Junghwan; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Weman, Helge; Fimland, Bjørn Ove Myking; Helvoort, Antonius Van. (2023) Understanding the structure and composition of an annealed Pd/Ge/Au Contacts to n-GaAs Nanowires. Microscopy of Semiconducting Materials

2022

• Konferanseposter
  Li, Yang; Nilsen, Tron Arne; Liudi Mulyo, Andreas; Ren, Dingding; Weman, Helge; Fimland, Bjørn Ove Myking. (2022) Selective area epitaxy of GaN nanowires on single-layer graphene substrates by molecular beam epitaxy. Int. Workshop on Nitride Semiconductors
• Konferanseforedrag
  Mukherjee, Anjan; Ren, Dingding; Vullum, Per Erik; Huh, Junghwan; Fimland, Bjørn Ove Myking; Weman, Helge. (2022) Axial GaAs/AlGaAs Nanowire Solar Cell on Si with Ultra-High Power-per-Weight Ratio. III-V Semiconductors for Energy Conversion Technologies
• Konferanseposter
  Ren, Dingding; Chen, Z.; Borisov, B.; Vullum, Per Erik; Nilsen, Julie Stene; Ahtapodov, Lyubomir; Li, Yang; Helvoort, Antonius Van; Fimland, Bjørn Ove Myking; Liu, Z.. (2022) Growth and Characterization of InGaN/GaN Nanowires on Graphene Glass. Int. Workshop on Nitride Semiconductors
• Konferanseposter
  Li, Yang; Nilsen, Tron Arne; Liudi Mulyo, Andreas; Mukherjee, Anjan; Ren, Dingding; Weman, Helge; Fimland, Bjørn Ove Myking. (2022) Selective area MBE growth of GaN nanowires on graphene/sapphire using a hole-patterned SiO2 mask. The 1st TNNN Conference & Norwegian Nano Symposium 2022
• Konferanseposter
  Li, Yang; Nilsen, Tron Arne; Mukherjee, Anjan; Ren, Dingding; Weman, Helge; Fimland, Bjørn Ove Myking. (2022) Selective area epitaxy of GaN nanowires on graphene substrates by plasma assisted molecular beam epitaxy. The 22nd International Conference on Molecular Beam Epitaxy
• Konferanseforedrag
  Weman, Helge. (2022) III-V nanowire/graphene hybrid structures for applications in solar cells and UV LEDs. Invited talk at EPFL
• Konferanseposter
  Ren, Dingding; Nilsen, Tron Arne; Nilsen, Julie Stene; Ahtapodov, Lyubomir; Mukherjee, Anjan; Li, Yang; Helvoort, Antonius Van; Weman, Helge; Fimland, Bjørn Ove Myking. (2022) MBE Growth of GaAsSb/GaAs Multiple Quantum Disk Nanowires on Few-layer Graphene for Photonic Applications. 22nd International Conference on Molecular Beam Epitaxy
• Konferanseforedrag
  Weman, Helge. (2022) III-V nanowire/graphene hybrid structures for applications in solar cells and UV LEDs. Invited talk at Int. symp. on Semiconductor Materials and Devices
• Foredrag
  Weman, Helge. (2022) Litt bakgrunn og historikk til opprinnelsen av CrayoNano. Invitert til styremøte NFR Muliggjørende teknologier

2021

• Intervju
  Mukherjee, Anjan; Fimland, Bjørn-Ove; Weman, Helge. (2021) Gallium arsenide nanowire solar cell with 7.7% efficiency.
• Konferanseposter
  Li, Yang; Nilsen, Tron Arne; Mukherjee, Anjan; Liudi Mulyo, Andreas; Fimland, Bjørn-Ove; Weman, Helge. (2021) Selective area growth of GaN nanowires on sapphire and graphene substrates by molecular beam epitaxy. 21st International Conference on Molecular Beam Epitaxy
• Konferanseforedrag
  Weman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as a transparent conducting substrate. Invited talk "The 7th International Forum on Wide Bandgap Semiconductors "
• Konferanseforedrag
  Weman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as substrate and transparent electrode. Invited talk "Epitaxy on 2D materials for layer release and their applications"
• Intervju
  Mukherjee, Anjan; Fimland, Bjørn-Ove; Weman, Helge. (2021) New ultra-high material efficient, low-cost solar cells — using nanowires.
• Intervju
  Mukherjee, Anjan; Fimland, Bjørn-Ove; Weman, Helge. (2021) New ultra-high material efficient, low-cost solar cells — using nanowires.
• Konferanseforedrag
  Weman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as a transparent conducting substrate. Invited talk "The XXIst International Workshop on the Physics of Semiconductor Devices (IWPSD 2021)"
• Foredrag
  Weman, Helge. (2021) Litt bakgrunn og historikk til opprinnelsen av CrayoNano. Feiring CrayoNano betaling av patenter fra NTNU
• Konferanseforedrag
  Weman, Helge. (2021) AlGaN nanowire UV LEDs using graphene as substrate and transparent electrode. Invited talk "Quantum Science and Condensed Matter Seminar"
• Foredrag
  Weman, Helge. (2021) Nanowire/graphene UVC LEDs. NTNU Nanokveld

2020

• Konferanseforedrag
  Weman, Helge. (2020) AlGaN nanowire UV LEDs using graphene as substrate and transparent electrode. Invited talk 5th International Conference on Emerging Electronics

2019

• Konferanseposter
  Ren, Dingding; Chen, Z; Nilsen, Julie Stene; Ahtapodov, Lyubomir; Borisov, B.; Mukherjee, Anjan; Li, Y; Liu, Z; Helvoort, Antonius Van; Fimland, Bjørn-Ove. (2019) Epitaxially Grown InGaN/GaN Nanowires on Graphene Glass. 13th International Conference on Nitride Semiconductors 2019 (ICNS-13)
• Konferanseposter
  Liudi Mulyo, Andreas; Rajpalke, Mohana Krishnappa; Vullum, Per Erik; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) The Influence of AlN Buffer Layer on the Growth of Self-Assembled GaN Nanocolumns on Graphene. The 13th International Conferences on Nitride Semiconductors
• Konferanseforedrag
  Mukherjee, Anjan; Mosberg, Aleksander Buseth; Ren, Dingding; Li, Yang; Ahtapodov, Lyubomir; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2019) Radial Junction GaAs Nanowire Solar Cells: Towards Efficient Performance. 10th Annual NanoNetwork conference
• Konferanseforedrag
  Ren, Dingding; Ahtapodov, Lyubomir; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2019) Crystal phase engineering in GaAsSb/GaAs nanowires grown by MBE. 1st International Workshop on Crystal-Phase Structures in Nanowires
• Konferanseforedrag
  Nilsen, Julie Stene; Huh, Junghwan; Munshi, A Mazid; Dheeraj, Dasa; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2019) Contacting nanostrusctures: detailed characterisation of the Au/Ge/GaAs nanowire interface. Microscopy of Semiconducting Materials (MSM-XXI)
• Konferanseforedrag
  Liudi Mulyo, Andreas; Rajpalke, Mohana; Vullum, Per Erik; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) The influence of AlN buffer layer on the growth of self-assembled GaN nanocolumns on graphene. Nanowire week
• Konferanseposter
  Mosberg, Aleksander Buseth; Myklebost, Steinar; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2019) Characterizing nanowire arrays by computer vision based on SEM images. 16th European microbeam analysis society meeting
• Foredrag
  Weman, Helge. (2019) Nanowire UV LEDs using graphene as substrate and transparent electrode. Grey Goo Symposium
• Intervju
  Weman, Helge. (2019) Scientists create ultraviolet light on a graphene surface.
• Intervju
  Høiaas, Ida Marie; Weman, Helge; Fimland, Bjørn-Ove. (2019) Utviklet nanomateriale som kan erstatte kvikksølv.
• Intervju
  Høiaas, Ida Marie; Weman, Helge; Fimland, Bjørn-Ove. (2019) New nanomaterial to replace mercury.
• Konferanseforedrag
  Liudi Mulyo, Andreas; Kim, Dong Chul; Høiaas, Ida Marie; Ahtapodov, Lyubomir; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) Utilization of Graphene as Substrate and Bottom Electrode for High-Density and Vertically-Aligned GaN/AlGaN Nanocolumns in Light-Emitting Diodes in the UV-A. 10th annual workshop on Norwegian PhD Network on Nanotechnology for Microsystems
• Intervju
  Weman, Helge. (2019) UV LEDs on graphene: Cheaper and ten times more efficient.
• Foredrag
  Weman, Helge. (2019) Using graphene as epitaxial substrate and transparent electrode for semiconductor devices. Invited talk at Graphene 2019
• Konferanseforedrag
  Weman, Helge. (2019) AlGaN nanowire UV LED using graphene as substrate and transparent bottom electrode. Invited talk 16th China International Forum on Solid State Lighting
• Konferanseforedrag
  Weman, Helge. (2019) AlGaN nanowire UV LED using graphene as substrate and transparent bottom electrode. Invited talk Beijing Graphene Institute
• Intervju
  Høiaas, Ida Marie; Weman, Helge; Fimland, Bjørn-Ove. (2019) Ny og ufarlig elektronisk komponent kan erstatte kvikksølv.
• Intervju
  Weman, Helge. (2019) Un nuevo nanomaterial reemplaza al mercurio para producir luz UVC.
• Konferanseposter
  Liudi Mulyo, Andreas; Rajpalke, Mohana; Vullum, Per Erik; Weman, Helge; Kishino, Katsumi; Fimland, Bjørn-Ove. (2019) The influence of AlN buffer layer on the growth of self-assembled GaN nanocolumns on graphene. Nanowire Week 2019
• Konferanseforedrag
  Weman, Helge. (2019) AlGaN nanowire UV LED using graphene as substrate and transparent bottom electrode. Invited talk at Neel Institute

2018

• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2018) Building miniature lasers using nanowire.
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2018) Lager miniatyrlasere i nanotråder.
• Konferanseposter
  Munshi, Abdul Mazid; KIM, DONG CHUL; Heimdal, Carl Philip J; Heilmann, Martin; Christiansen, Silke; Vullum, Per Erik; Helvoort, Antonius Van; Weman, Helge. (2018) Positioned-controlled growth of AlGaN nanopyramid arrays on graphene by metal-organic vapor phase epitaxy. Int. Workshop on Nitride Semiconductors
• Foredrag
  Weman, Helge. (2018) AlGaN nanowire UV LED using graphene as substrate and transparent electrode. Invited talk at Solid State Lighting-China 2018
• Konferanseforedrag
  Weman, Helge. (2018) Growth and fabrication of III-V nanowire/graphene hybrid structures and devices. Invited talk at Nanowire Week
• Konferanseforedrag
  Weman, Helge. (2018) Using graphene as an epitaxial substrate and transparent electrode for GaN/AlGaN UV LEDs. Invited talk at Solid State Devices and Materials-Japan
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2018) Building Miniature Lasers with Nanowires.
• Intervju
  Weman, Helge. (2018) Vil revolusjnere UV LED markedet.
• Konferanseposter
  Liudi Mulyo, Andreas; Rajpalke, Mohana Krishnappa; Kuroe, Haruhiko; Vullum, Per Erik; Weman, Helge; Fimland, Bjørn-Ove; Kishino, Katsumi. (2018) Growth and characterization of GaN nanocolumns grown on graphene using a thin AlN buffer layer. International Workshop on Nitride Semiconductors (IWN2018)
• Konferanseposter
  Høiaas, Ida Marie; Liudi Mulyo, Andreas; Vullum, Per Erik; Ahtapodov, Lyubomir; KIM, DONG CHUL; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge. (2018) GaN/AlGaN nanocolumn UV LED using graphene as substrate and transparent electrode. Int. Workshop on Nitride Semiconductors
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2018) Building minature lasers with nanowires.
• Konferanseforedrag
  Weman, Helge. (2018) III-V semiconductor nanowire/graphene hybrid structures and devices. Invited talk at Technical University of Berlin
• Konferanseforedrag
  Weman, Helge. (2018) Using graphene as epitaxial substrate and transparent electrode for semiconductor devices. Invited talk at Beijing Graphene Forum and BGI Inauguration
• Konferanseposter
  Nylund, Inger-Emma; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2018) Electron microscopy characterization of GaN Nanowires grown on graphene. CSI2018
• Konferanseposter
  Nilsen, Julie Stene; Ånes, Håkon Wiik; Andersen, Ingrid Marie; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2018) Large Area Crystal Phase Mapping by Scanning Electron Diffraction and Machine Learning Data Analysis. Scandem 2018
• Konferanseforedrag
  Ren, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Gustafsson, A.; Huh, Junghwan; Kim, Dong-Chul; Conibeer, G; Helvoort, Antonius Van; Fimland, Bjørn-Ove. (2018) Single Nanowire Laser with GaAsSb-based Multiple-Superlatticed Gain Structure. 60th electronic materials conference at UCSB
• Konferanseforedrag
  Ren, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Huh, Junghwan; Kim, Dong-Chul; Conibeer, G; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2018) Single Nanowire Laser with GaAsSb-based Multiple-Superlatticed Gain Structure. Compound Semiconductor week 2018
• Konferanseposter
  Ahtapodov, Lyubomir; Munshi, A Mazid; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2018) Optical determination of the GaAs zinc blende/wurtzite band offsets. Nanowire Week 2018
• Intervju
  Weman, Helge. (2018) Tenk Stort- Tenk Nano.
• Konferanseforedrag
  Mukherjee, Anjan; Shin, Dong Hoon; Munshi, Abdul Mazid; Dheeraj, Dasa; Nam, Jung Tae; Kim, Keun Sook; Fimland, Bjørn-Ove; Weman, Helge; Lee, Sang Wook; Kim, Dong-Chul. (2018) Bias-dependent Scanning Photocurrent Microscopy on a Single GaAs Nanowire Graphene Hybrid Device. NTNU Nano Symposium
• Konferanseforedrag
  Weman, Helge. (2018) III-V semiconductor nanowire/graphene hybrid structures and devices. Invited talk at NTNU NanoLab Symposium 2018
• Konferanseposter
  Mukherjee, Anjan; Ren, Dingding; Islam, M. A.; Mosberg, Aleksander Buseth; Li, Yang; Ahtapodov, Lyubomir; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2018) Monitoring Axial and Radial Junction GaAs Nanowire Solar Cells Through a New Approach: Towards Efficient Performance. NTNU Nano Symposium
• Konferanseforedrag
  Mukherjee, Anjan; Shin, Dong Hoon; Munshi, Abdul Mazid; Dheeraj, D.L.; Nam, Jung Tae; Kim, Keun Sook; Fimland, Bjørn-Ove; Weman, Helge; Lee, Sang Wook; KIM, DONG CHUL. (2018) Bias-dependent scanning photocurrent microscopy on embedded single GaAs nanowire/graphene hybrid device. Nanowire Week
• Konferanseforedrag
  Høiaas, Ida Marie; Liudi Mulyo, Andreas; Vullum, Per Erik; Ahtapodov, Lyubomir; KIM, DONG CHUL; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge. (2018) Using graphene as substrate and transparent electrode in an GaN/AlGaN nanocolumn flip-chip UV LED. Nanowire Week
• Konferanseforedrag
  Weman, Helge. (2018) Using graphene as epitaxial substrate and transparent electrode for AlGaN UV LEDs. Invited talk at ImagineNano 2018
• Konferanseforedrag
  Weman, Helge. (2018) Growth and Fabrication of III-V Nanowire/Graphene Hybrid Structures and Devices. Invited talk at NTT Res. Lab, Atsugi, Japan

2017

• Konferanseposter
  Mukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Kim, Keun Sook; Lee, Sang Wook; Munshi, Abdul Mazid; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge. (2017) Embedded single GaAs nanowire/graphene hybrid devices fabricated by a position- controlled micro transfer and imprinting technique. Nanowire week
• Konferanseposter
  Mukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Nam, Jungtae; Kim, Keun Sook; Lee, Sang Wook; Munshi, Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove. (2017) Single GaAs nanowire/graphene hybrid devices fabricated by a position controlled micro transfer and imprinting technique for embedded structures. MRS Spring meeting 2017
• Konferanseposter
  Mukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Nam, Jungtae; Kim, Keun Sook; Lee, Sang Wook; Munshi, Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove. (2017) An Imprinting Technique to Fabricate Embedded Single GaAs Nanowire/Graphene Hybrid Devices. Carbonhagen 2017
• Konferanseforedrag
  Weman, Helge. (2017) III-V semiconductor nanowire/graphene structures and photonic devices. Invited talk at Int. workshop on Physics of Semiconductor Devices
• Konferanseposter
  Mukherjee, Anjan; KIM, DONG CHUL; Munshi, Mazid; Dasa, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2017) Fabrication of Single GaAs Nanowire/Graphene Hybrid Devices for Optoelectronic Applications. Nordic Nanolab User Meeting (NNUM) 2017
• Konferanseforedrag
  Mukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Seo, Miri; Nam, Jung Tae; Kim, Keun Soo; Munshi, Mazid; Dasa, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2017) High-Quality Single GaAs Nanowire/Graphene Junctions Fabricated by using an Imprinting Technique for Embedded Nanowire Configurations. 8th Annual Workshop of the Norwegian PhD Network on Nanotechnology for Microsystems - 2017
• Intervju
  Weman, Helge. (2017) Norway pioneers new UV LEDs.
• Intervju
  Weman, Helge. (2017) En reaktor blir installert i Trondheim. Den gror halvleder nanotråder til UV LED som dreper bakterier og desinfiserer.
• Intervju
  Weman, Helge. (2017) Sluppen klar for industrieventyr.
• Intervju
  Weman, Helge. (2017) Teknologiselskap henter 50 millioner og ny ledelse.
• Intervju
  Weman, Helge. (2017) Gründerselskapet CrayoNano AS vil nå et etablere et pilotanlegg for utvikling av en ny type UV-LED i Trondheim.
• Intervju
  Weman, Helge. (2017) UV LED av nanotråder på grafén.
• Foredrag
  Liudi Mulyo, Andreas; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) Epitaxy Feasibility of n-type GaN/AlGaN Nanocolumns on Silica Glass. Compound Semiconductor Week 2017
• Konferanseforedrag
  Høiaas, Ida Marie; Liudi Mulyo, Andreas; KIM, DONG CHUL; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge. (2017) AlGaN/GaN nanowire flip-chip UV LED using graphene as substrate and transparent electrode. Nano@NTNU
• Foredrag
  Liudi Mulyo, Andreas; Høiaas, Ida Marie; KIM, DONG CHUL; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) AlGaN/GaN Nanocolumn Flip-Chip UV LEDs Grown on Graphene/Silica Glass. The 11th International Symposium on Semiconductor Light Emitting Devices
• Foredrag
  Liudi Mulyo, Andreas; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) Epitaxial Growth of Vertical n-type GaN/AlGaN Nanocolumns on Graphene/Silica Glass. The 12th International Conferences on Nitride Semiconductors
• Konferanseposter
  Liudi Mulyo, Andreas; Høiaas, Ida Marie; Rajpalke, Mohana Krishnappa; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2017) Graphene as a substrate and bottom electrode for high density and vertically aligned GaN nanocolumns. Nano@NTNU Symposium
• Konferanseforedrag
  Weman, Helge. (2017) III-V semiconductor nanowire/graphene hybrid structures and devices. Fredagkollokvie fysikk
• Konferanseforedrag
  Weman, Helge. (2017) III-V semiconductor nanowire/graphene structures and photonic devices. Invited talk at KTH
• Foredrag
  Helvoort, Antonius Van; Garmannslund, Andreas; Bogen, J; Nilsen, Julie Stene; Fauske, vidar T.; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove. (2017) Improved compositional mapping of heterostructured nanowire (by STEM-EDX). Nanowire Week
• Konferanseposter
  Mosberg, Aleksander Buseth; Myklebost, S; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2017) Exploring focused ion beam substrate patterning for nanowire growth. Nanowire Week
• Konferanseposter
  Mosberg, Aleksander Buseth; Myklebost, S; Ren, Dingding; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2017) Evaluating focused ion beam patterning for nanowire growth using computer vision. EMAG/MMC
• Foredrag
  Fauske, vidar T.; Huh, Junghwan; Divitini, Giorgio; Munshi, A Mazid; Dheeraj, D.L.; Ducati, C; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2017) In-situ studying the heat‐induced replacement of GaAs by Au. In-situ TEM sample-management solution workshop
• Konferanseposter
  Ren, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Gustafsson, A; Huh, Junghwan; Kim, D.C.; Conibeer, G; Helvoort, Antonius Van; Fimland, Bjørn-Ove. (2017) High-Q factor, single-mode, room-temperature lasing from GaAsSb/GaAs nanowire superlattices. Nanowire Week
• Konferanseforedrag
  Ren, Dingding; Ahtapodov, Lyubomir; Nilsen, Julie Stene; Yang, J.; Gustafsson, Anders; Huh, Junghwan; Conibeer, G; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2017) Ternary GaAsSb Nanowire for Optoelectronic Applications. Nano@NTNU symposium 2017
• Foredrag
  Weman, Helge. (2017) Changing the UV LED industry and beyond. TTO vårslæpp
• Konferanseforedrag
  Weman, Helge. (2017) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. Invited talk Erik Bakkers group, Eindhoven TU
• Konferanseforedrag
  Weman, Helge. (2017) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. Invited talk KIST, Korea
• Konferanseposter
  Høiaas, Ida Marie; Liudi Mulyo, Andreas; KIM, DONG CHUL; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge. (2017) Graphene as growth substrate and transparent electrode for flip-chip GaN/AlGaN nanocolumn UV-LEDs. Carbonhagen 2017
• Konferanseforedrag
  Weman, Helge. (2017) III-V semiconductor nanowire/graphene hybrid structures and devices. Invited talk in Prof. Zetian Mi's group Uni. Michigan
• Konferanseforedrag
  Weman, Helge. (2017) III-V semiconductor nanowire/graphene hybrid structures and devices. Invited talk in prof. Zhongfan Liu-s group
• Foredrag
  Weman, Helge. (2017) AlGaN nanowire flip-chip UV LEDs grown on graphene/glass. SSL China 2017
• Konferanseforedrag
  Weman, Helge. (2017) Epitaxial growth of semiconductor nanostructures on graphene. Carbonhagen 2017
• Foredrag
  Weman, Helge. (2017) AlGaN nanostructures on graphene: A new disruptive technology for UV LEDs. LED Taiwan 2017
• Konferanseforedrag
  Weman, Helge. (2017) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. Invited talk at South China University

2016

• Foredrag
  Helvoort, Antonius Van; Fauske, Vidar Tonaas; Huh, Junghwan; Divitini, G; Dheeraj, D.L.; Munshi, A; Ducati, C; Weman, Helge; Fimland, Bjørn-Ove. (2016) The kinetics and dynamics of Au-GaAs solid state replacements, studied by in situ TEM. Dens preScandem Workshop
• Foredrag
  Nilsen, Julie Stene; Huh, Junghwan; Munshi, A; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2016) Characterization of Pd/Ge/Au contacts on GaAs Nanowires. 67th Scandem Meeting
• Foredrag
  Nilsen, Julie Stene; Huh, Junghwan; Munshi, A; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2016) Transmission electron microscopy study of Pd/Ge/Au contacts to GaAs nanowires. 7th NanoNetwork workshop
• Foredrag
  Ren, Dingding; Dheeraj, D.L.; Jin, C; Nilsen, Julie Stene; Huh, Junghwan; Reinertsen, Johannes F; Munshi, A; Gustafsson, Anders; Helvoort, Antonius Van; Weman, Helge. (2016) Self-catalyzed GaAsSb nanowires grown on silicon and graphene by molecular beam epitaxy: high-yield with stabilized crystal phase. 7th NanoNetwork workshop
• Konferanseposter
  Høiaas, Ida Marie; KIM, DONG CHUL; Weman, Helge. (2016) Aluminum-induced crystallization of Si on graphene for optoelectronic devices. Carbonhagen 2016
• Konferanseposter
  Mukherjee, Anjan; KIM, DONG CHUL; Yun, Hoyeol; Munshi, Mazid; Dasa, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2016) Comparison Study of Bottom- & Top- Graphene/Single GaAs Nanowire Contacts for Optoelectronic Applications. The Nano NTNU Symposium 2016
• Konferanseforedrag
  Nilsen, Julie Stene; Huh, Junghwan; Munshi, A Mazid; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2016) Pd/Ge/Au contacts on GaAs Nanowires. Nano@NTNU workshop
• Konferanseposter
  Nilsen, Julie Stene; Mosberg, Aleksander Buseth; Garmannslund, Andreas; Reinertsen, Johannes F; Munshi, A Mazid; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2016) Self-Induced Compositional Variations in GaAs/AlGaAs Core-Shell Nanowires. European Microscopy Congress 2016
• Konferanseposter
  Høiaas, Ida Marie; KIM, DONG CHUL; Weman, Helge. (2016) Large-grained Si(111) crystalline thin film on graphene by aluminum-induced crystallization. Graphene 2016
• Konferanseforedrag
  Weman, Helge. (2016) Epitaxial growth of heterostructured III-V semiconductor nanowires on graphene. Invited talk in Prof. Zetian Mi's and Thomas Szkopek's group, McGill University, Montreal
• Foredrag
  Ren, Dingding; Dheeraj, D.L.; Nilsen, Julie Stene; Huh, Junghwan; Helvoort, Antonius Van; Weman, Helge; Fimland, Bjørn-Ove. (2016) Effects of Sb on Crystal Phase, Morphology and Optical Emission of Self-catalyzed GaAsSb Nanowires on Si(111) and Graphitic Substrates. 19th International Conference on Molecular Beam Epitaxy
• Konferanseforedrag
  Weman, Helge. (2016) Epitaxial growth of semicondcutor nanowires on graphene. Invited talk in Prof. Bhattacharya's group, TIFR-Mumbai
• Intervju
  Weman, Helge. (2016) Grafén – fremtidens superstoff.
• Foredrag
  Weman, Helge. (2016) Ultraviolet LEDs: A killer application for graphene?. 2nd Annual China International Graphene Summit
• Konferanseforedrag
  Weman, Helge. (2016) III-V semiconductor nanowires grown on Si and graphene for optoelctronic applications. Invited talk in Prof. Kawakami's group, Kyoto University, Japan
• Foredrag
  Liudi Mulyo, Andreas; Konno, Yuta; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2016) Self-Organized Vertical GaN Nanocolumns Grown on Silica Glass by RF-Molecular Beam Epitaxy. 19th International Conference on Molecular Beam Epitaxy
• Konferanseposter
  KIM, DONG CHUL; Jungtae, Nam; Hoyeol, Yun; Seungjin, Nam; Yeong, Hwang Jun; Wook, Lee Sang; Weman, Helge; Sook, Kim Keun. (2016) Investigation of graphene growth on platinium by chemical vapor deposition. Graphene2016
• Foredrag
  Liudi Mulyo, Andreas; Konno, Yuta; Weman, Helge; Kishino, Katsumi. (2016) Self-Organized GaN Nanocolumns Grown on Silica Glass by RF-Molecular Beam Epitaxy. Japanese Physical Society Spring Meeting
• Konferanseposter
  KIM, DONG CHUL; Jungtae, Nam; Hoyeol, Yun; Seungjin, Nam; Yeong, Hwang Jun; Wook, Lee Sang; Weman, Helge; Sook, Kim Keun. (2016) Chemical vapor deposition of graphene and its physisorption strain on Pt substrates. Carbonhagen 2016
• Foredrag
  Weman, Helge. (2016) Epitaxial growth of semiconductor nanostructures on graphene: Generic model and a potential first device application. NanoSpain 2016
• Foredrag
  Weman, Helge. (2016) Epitaxial growth of semiconductor nanostructures on graphene: A solution for UV LEDs. Graphene Canada 2016
• Konferanseforedrag
  Liudi Mulyo, Andreas; Konno, Yuta; Fimland, Bjørn-Ove; Weman, Helge; Kishino, Katsumi. (2016) Growth of Self-Organized Vertical GaN Nanocolumns Utilizing AlN as Nucleation Sites on Single Layer Graphene/Silica Glass by Molecular Beam Epitaxy. International Workshop on Nitride Semiconductors (IWN 2016)
• Foredrag
  Ren, Dingding; Huh, Junghwan; Dheeraj, D.L.; Weman, Helge; Fimland, Bjørn-Ove. (2016) Ga­diffusion Induced Morphological and Compositional Variations in Self­Catalyzed GaAsSb Nanowire Array. MRS 2016 Fall Meeting NM1: Semiconducting Nanowires, Nanoribbons and HeterostructuresSynthesis, Characterizations and Functional Devices
• Foredrag
  Weman, Helge. (2016) AlGaN Nanowire/Graphene Deep UV LEDs. 13th China International Forum on Solid State Lighting (SSLCHINA 2016)

2015

• Konferanseforedrag
  Weman, Helge. (2015) III-V semiconductor nanowires on graphene for photonic applications. Invited talk in Prof. Zhiqiang Liu's group, State Key Lab on Solid State Lighting
• Foredrag
  Weman, Helge. (2015) High-efficiency AlGaN nanowire/graphene deep UV LEDs. LED Taiwan 2015 TechXPOT
• Konferanseforedrag
  Nilsen, Julie Stene; Reinertsen, Johannes F; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2015) Compositional variations in the shells of GaAs/AlGaAs core-shell nanowires. MMC/EMAG
• Konferanseposter
  Nilsen, Julie Stene; Reinertsen, Johannes F; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2015) Radial composition variations in the shells of GaAs/AlGaAs core-shell nanowires. Nano@NTNU
• Konferanseposter
  Høiaas, Ida Marie Eriksdatter; Ren, Dingding; Reinertsen, Johannes F; KIM, DONG CHUL; Fimland, Bjørn-Ove; Weman, Helge. (2015) GaAs Nanowire Growth on [111]-oriented Silicon with sub-grain Thickness. Nano Network Workshop
• Foredrag
  Weman, Helge. (2015) Nanowire/Graphene UV LEDs. China Graphene Innovation Award
• Intervju
  Weman, Helge. (2015) Forskere vil bli kvitt kvikksølvlamper.
• Intervju
  Weman, Helge. (2015) Norske forskere vil utkonkurrere kvikksølv i vannrensing.
• Foredrag
  Weman, Helge. (2015) Lysdioder. Invetert forelesning for 4e klasse Energi og Miljø
• Konferanseforedrag
  Weman, Helge. (2015) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk in Prof. Samuelson's group, Lund University, Sweden
• Intervju
  Weman, Helge. (2015) Nanordsun; Semiconductor nanowire-based solar cells.
• Deltakelse i radio- eller TV
  Weman, Helge. (2015) Grafén - framtidens vidundermateriale?.
• Konferanseforedrag
  Weman, Helge. (2015) III-V semiconductor nanowiress grown on Si and graphene for photonic applications. Invited talk in Prof. Kishino's group, Sophia University, Tokyo
• Intervju
  Weman, Helge. (2015) Grafén-Stoffenes Usain Bolt.
• Konferanseforedrag
  Weman, Helge. (2015) Epitaxial growth of semiconductor nanowires on graphene. 1st Int. Conf. on Graphene Technology
• Konferanseforedrag
  Weman, Helge. (2015) Epitaxial growth of semiconductor nanowires on graphene: Generic model and potential device applications. Graphene Science Symposium
• Foredrag
  Weman, Helge. (2015) Nanoteknologi. Teknologisprang for utvikling av havrommet
• Konferanseforedrag
  Weman, Helge. (2015) III-V semiconductor nanowires grown by MBE on silicon and graphene for photonic applications. Invited talk in Prof. Silke Christiansen's group, Max Planck Inst., Erlangen
• Konferanseforedrag
  Ren, Dingding; Dheeraj, D.L.; Huh, Junghwan; Reinertsen, Johannes F; Mazid, A. M.; Kim, Dong-Chul; Helvoort, Antonius Van; Weman, Helge; Fimland, Bjørn-Ove. (2015) High-yield self-catalyzed GaAsSb/GaAs heterostructured nanowire array on Si(111) by molecular beam epitaxy. Nano@NTNU
• Konferanseforedrag
  Fauske, Vidar Tonaas; Erlbeck, Maximilian; Huh, Junghwan; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2015) In-situ electronic probing of semiconducting nanowires in an electron microscope. 19th Microscopy of Semiconducting Materials
• Konferanseposter
  Nilsen, Julie Stene; Reinertsen, Johannes F; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2015) Self-Induced Formation of Quantum Structures in the Shell of GaAs/AlGaAs Core-Shell Nanowires. Myfab/NorFab user meeting 2015
• Intervju
  Weman, Helge. (2015) -Når vi lykkes, vil vi tjene store penger.
• Konferanseposter
  Høiaas, Ida Marie Eriksdatter; Ren, Dingding; KIM, DONG CHUL; Reinertsen, Johannes F; Fimland, Bjørn-Ove; Weman, Helge. (2015) GaAs Nanowire Growth on [111]-oriented Silicon with sub-grain Thickness. MyFab and NorFab user meeting
• Foredrag
  Weman, Helge. (2015) Selective-area growth of GaN/AlGaN nanostructures on graphene for high-efficiency deep UV LEDs. 12th China international forum on solid state lighting
• Konferanseposter
  Munshi, Abdul Mazid; Ren, Dingding; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Aas, Lars Martin Sandvik; Helvoort, Antonius Van; Weman, Helge; Fimland, Bjørn-Ove. (2015) On the growth of self-catalyzed GaAs nanowires on Si substrates: Opportunities and limitations. 31st North American Conference on Molecular Beam Epitaxy
• Intervju
  Weman, Helge. (2015) Materials Innovations Help LEDs Turn On.
• Intervju
  Fimland, Bjørn-Ove; Weman, Helge. (2015) Denne lager superstoff som kan forandre verden.
• Konferanseposter
  Ren, Dingding; Høiaas, Ida Marie; Reinertsen, Johannes F; Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Huh, Junghwan; Kim, Dong-Chul; Weman, Helge; Fimland, Bjørn-Ove. (2015) Growth optimization for self-catalyzed GaAs nanowires on metal induced crystallized amorphous substrate. 31st North American Conference on Molecular Beam Epitaxy
• Foredrag
  Weman, Helge. (2015) Deep Ultraviolet LEDs: A killer Application for Graphene?. Graphene and 2D Materials
• Intervju
  Weman, Helge. (2015) Nobelprisen i fysikk 2014.
• Intervju
  Weman, Helge. (2015) Ett steg nærmere grafénprodukter.
• Intervju
  Weman, Helge. (2015) 단일 나노선 고효율 응용소자’ 개발 High-efficiency single nanowire device developed.
• Konferanseposter
  Huh, Junghwan; Yun, Hoyeol; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Lee, Sang Wook; Kim, Dong-Chul; Fimland, Bjørn-Ove; Weman, Helge. (2015) Photocurrent Mapping of Single GaAsSb Nanowire Diodes. Nanowire Growth Workshop 2015
• Konferanseforedrag
  Ren, Dingding; Dasa Lakshmi Narayana, Dheeraj; Huh, Junghwan; Reinertsen, Johannes F; Munshi, Abdul Mazid; Kim, Dong-Chul; Helvoort, Antonius Van; Weman, Helge; Fimland, Bjørn-Ove. (2015) High-yield Self-catalyzed GaAsSb/GaAs Heterostructured Nanowire Array on Si(111) by Molecular Beam Epitaxy. Nanowire Growth Workshop 2015
• Intervju
  Fimland, Bjørn-Ove; Weman, Helge. (2015) I verdenstoppen på nanoteknologi.
• Konferanseforedrag
  Heilmann, Martin; Munshi, Abdul Mazid; Tessarek, Christian; Sarau, George; Bashouti, Mohammad; Göbelt, Manuela; Latzel, Michael; Hofmann, Björn; Weman, Helge; Christiansen, Silke. (2015) Metal-organic vapor phase epitaxy of GaN nanorods on graphene. 6th Int. symposium on growth of III-nitrides
• Konferanseposter
  Reinertsen, Johannes F; Nilsen, Julie Stene; Mosberg, Aleksander Buseth; Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2015) Self-Induced Formation of Quantum Well Tubes in Self-Catalyzed GaAs/AlGaAs Core-Shell Nanowires. 582. WE-Heraeus-Seminar on III-V Nanowire Photonics
• Foredrag
  Høiaas, Ida Marie; KIM, DONG CHUL; Weman, Helge. (2015) Silicon-graphene heterostructure for optoelectronic devices. 7th Nanonetwork workshop

2014

• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Reinertsen, Johannes F; Ahtapodov, Lyubomir; Lee, KD; Heidari, B.; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2014) Position controlled GaAs nanowires on 2-inch Si wafers using nanoimprint lithography. MRS Spring Meeting
• Foredrag
  Weman, Helge. (2014) Halvleder-nanotråder på grafén for neste generasjon IKT. Invetert forelesning for 1e klasse ELSYS
• Foredrag
  Weman, Helge. (2014) Nobelprisen i fysikk 2014. Årets Nobelpris i fysikk
• Konferanseforedrag
  Weman, Helge. (2014) Towards low-cost, high-efficiency semiconductor nanowire/graphene solar cells. Bring the Nanoworld Together
• Konferanseforedrag
  Weman, Helge. (2014) III-V semiconductor nanowires@NTNU. Nanolab 10th aniversium
• Konferanseforedrag
  Svendsen, Guro Kristin; Skaar, Johannes; Weman, Helge; Dupertuis, M.-A.. (2014) Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires. ICPS 2014
• Intervju
  Weman, Helge. (2014) Smått og godt.
• Konferanseforedrag
  Signorello, G.; Lörtscher, E; Khomyakov, P.A.; Karg, S.; Dasa Lakshmi Narayana, Dheeraj; Gotsmann, B.; Weman, Helge; Riel, H.. (2014) Inducing a Direct-to-Pseudodirect Bandgap Transition in Wurtzite GaAs Nanowires with Uniaxial Stress. MRS 2014Spring Meeting
• Intervju
  Weman, Helge. (2014) Bedre solceller og LED-lys.
• Konferanseforedrag
  Signorello, G.; Lörtscher, E; Khomyakov, P.A.; Karg, S.; Dasa Lakshmi Narayana, Dheeraj; Gotsmann, B.; Weman, Helge; Riel, H.. (2014) Inducing a direct-to-pseudodirect bandgap transition in wutzite GaAs nanowires with uniaxial stress. Nanowire2014
• Intervju
  Weman, Helge. (2014) Nano-kongene.
• Intervju
  Weman, Helge. (2014) Dette er fremtidens supermateriale.
• Intervju
  Weman, Helge. (2014) Tweaking nanowires boosts solar cell and LED outputs.
• Intervju
  Weman, Helge. (2014) New physical phenomenon on nanowires seen for the first time.
• Konferanseforedrag
  Lim, Cheng Guan; Weman, Helge. (2014) Enhancing the Light-Matter Interactions in Radial p-n Junction Core-Shell Nanowires for Highly Efficient Nanowire Solar Cells. MRS 2014Spring Meeting
• Intervju
  Weman, Helge. (2014) Better solar cells, better LED light and vast optical possibilities.
• Konferanseforedrag
  Weman, Helge. (2014) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited Seminar in Prof. Xiong Qihua's group at Nanyang Technical Univeristy, Singapore
• Konferanseforedrag
  Weman, Helge. (2014) Towards flexible high-efficiency semiconductor nanowire/graphene solar cells. Invited talk: Nanofair 2014
• Intervju
  Weman, Helge. (2014) Nanowire light-emitting diodes.
• Intervju
  Weman, Helge. (2014) Better solar cells, better LED light and vast optical possibilities.
• Intervju
  Weman, Helge. (2014) Graphene and a modified structure of nanowires will improve solar cells and LED lighting.
• Konferanseforedrag
  Weman, Helge. (2014) How a Norwegian university project became the nanotech start-up CrayoNano. Invited talk :International Forum on the Nanotechnology Commercialization 2014"
• Intervju
  Weman, Helge. (2014) Nanokunnskap gir supersolceller.
• Konferanseforedrag
  Weman, Helge. (2014) Towards low cost high efficiency semiconductor nanowire graphene solar cells. Invited talk: 1 st International Symposium on Energy Challenges and Mechanics
• Konferanseforedrag
  Fauske, Vidar Tonaas; Huh, Junghwan; Erlbeck, Maximilian; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Weman, Helge; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2014) In-situ electronic probing of nanostructures in a FIB. Nanolab 10th aniversium
• Konferanseposter
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Ren, Dingding; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2014) Limitations of self-catalytic growth in controlling the diameter of GaAs nanowires on Si substrates. Nanowire2014
• Konferanseposter
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Ren, Dingding; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2014) Limitations of self-catalytic growth in controlling the diameter of GaAs nanowires on Si substrates. MBE2014
• Intervju
  Weman, Helge. (2014) Fremtidens supermateriale.
• Intervju
  Weman, Helge. (2014) Tuning a single nanowire improves solar cells and LEDs.
• Intervju
  Weman, Helge. (2014) New physical phenomenon on nanowires seen for the first time.
• Konferanseposter
  Lim, Cheng Guan; Weman, Helge. (2014) Optimal Solar Cell Efficiency of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Arrays. EU PVSEC 2014
• Intervju
  Weman, Helge. (2014) IBM Combines Light Emission and Detection in Single Nanowire.
• Intervju
  Weman, Helge. (2014) Stress Activates Light-Emitting Nanowires.
• Intervju
  Weman, Helge. (2014) Strain and light emission in gallium arsenide nanowires.
• Intervju
  Weman, Helge. (2014) Grønt lys for en ny verden.
• Konferanseposter
  Kauko, Hanne; Grieb, Tim; Munshi, Abdul Mazid; Müller, Knut; Weman, Helge; Rosenauer, A.; Fimland, Bjørn-Ove; Helvoort, Antonius Van. (2014) The outward diffusion of Sb during growth of antimonide III-V nanowires. 8th Nanowire Growth Workshop
• Konferanseforedrag
  Huh, Junghwan; Yun, H.; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kauko, Hanne; Helvoort, Antonius Van; Lee, SW; Fimland, Bjørn-Ove; Weman, Helge. (2014) GaAsSb nanowire diodes based on self-induced compositional variation. Nanowire2014

2013

• Konferanseposter
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; KIM, DONG CHUL; Todorovic, Jelena; Huh, Junghwan; Sandell, Susanne; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2013) GaAs nanowires grown on silicon and graphene for solar cell application. 4th annual NanoNetwork Workshop
• Konferanseposter
  Kauko, Hanne; Munshi, Abdul Mazid; Lim, Cheng Guan; KIM, DONG CHUL; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2013) Novel solar cells based on GaAs/AlGaAs core-shell nanowires. 4th annual Nanonetwork workshop
• Konferanseforedrag
  Fauske, Vidar Tonaas; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2013) Mechanical and electrical characterization of nanowire-substrate interfaces. 4th Annual Nanonetwork Workshop
• Konferanseposter
  Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Fauske, Vidar Tonaas; KIM, DONG CHUL; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2013) Epitaxial growth and characterization of vertical III-V semiconductor nanowires on graphene. 7th Nanowire Growth Workshop
• Konferanseposter
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2013) Limitations of self-catalytic growth in controlling diameter of GaAs nanowires on Si substrates. 7th Nanowire Growth Workshop
• Foredrag
  Weman, Helge. (2013) Grafén-og nanoblyanter. Kunnskapsbyen
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk at University of Copenhagen
• Konferanseforedrag
  Weman, Helge. (2013) III-V nanowire/graphene hybrid structures-A platform for future devices. Nanoscale communication technologies
• Foredrag
  Weman, Helge. (2013) NaNordSun-Semiconductor Nanowire Based Solar Cells. Nordic Innovation meeting on Top-level Research Initiative
• Foredrag
  Weman, Helge. (2013) II-V semiconductor nanowire project at NTNU. Norway-Texas meeting at NTNU
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene substrates for photonic applications. Invited talk in Prof. Yong-Hee Lee's group at Sungkyunkwan University
• Konferanseposter
  Lim, Cheng Guan; Weman, Helge. (2013) Design guidelines for radial p-n junction GaAs/AlGaAs core-shell nanowire solar cells. Nanowires-2013
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for solar cell applications. Invited talk in Prof. Hingwei Zhu's group at Tsinghua University
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk in Prof. Jianhua Zhao's group at Inst. of Semiconductors Chinese Academy of Sciences
• Konferanseforedrag
  Lim, Cheng Guan; Weman, Helge. (2013) Numerical Analysis and Device Optimization of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Solar Cells. 13th Int. Conf. on Numerical Simulations of Optoelectronic Devices
• Konferanseposter
  Huh, Junghwan; Kim, Dong-Chul; Yun, H.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, G.T.; Lee, S.W.; Fimland, Bjørn-Ove; Weman, Helge. (2013) Electrical properties of III-V semiconductor nanowires for solar cell applications. 4th Annual Nanonetwork Workshop
• Konferanseposter
  Ghalamestani, Sepideh Gorji; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Dick, Kimberly A. (2013) Self-catalyzed MBE grown GaAs/GaAsSb core-shell nanowires in ZB and WZ crystal structures. 7th Nanowire Growth Workshop
• Konferanseforedrag
  Weman, Helge. (2013) Epitaxial growth of semiconductor nanowires on graphene:Generic model and potential device applications. Physical Sciences Symposia – 2013 on ‘Crystal & Graphene Science
• Konferanseposter
  Ahtapodov, Lyubomir; Kauko, Hanne; Munshi, Abdul Mazid; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2013) Optical properties of self-catalyzed GaAs Nanowires with axial GaAsSb inserts. Nanowires-2013
• Konferanseposter
  Nam, J.; Kim, Dong-Chul; Andersen, P.C.; Park, S.J.; Dae, D.J.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Seo, S.. (2013) Synthesis and characterization of graphene on Pt using CVD. Korean Physical Society Spring Meeting
• Konferanseforedrag
  Weman, Helge. (2013) Epitaxial growth of vertical III-V semiconductor nanowires on graphene. The Collaborative Conference on Crystal Growth
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown by molecular beam epitaxy on Si and graphene substrates. Invited talk in Prof. Yapin Dang's group at Jia Tong University
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown by molecular beam epitaxy on Si and graphene substrates. Invited talk in Prof. Wei Lu's group at Shanghai Institute of Technical Physics,
• Konferanseforedrag
  Weman, Helge. (2013) Heterostructured III-V nanowires grown on Si and graphene for photonic applications. Invited talk in Xiamin Ren's group at Beijing University of Posts and Telecommunications
• Konferanseforedrag
  Weman, Helge. (2013) Semiconductor nanowires grown on graphene. 4th annual NanoNetwork Workshop
• Konferanseforedrag
  Huh, Junghwan; Kim, Dong-Chul; Yun, H.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kauko, Hanne; Helvoort, Antonius Van; Lee, S.W.; Fimland, Bjørn-Ove; Weman, Helge. (2013) Effects on compositional variation on the electrical property of GaAsSb nanowires. MRS 2013 Fall Meeting
• Intervju
  Weman, Helge. (2013) Grafén – supermateriale som vil revolusjonere fremtidens datamaskin.
• Intervju
  Weman, Helge. (2013) Måtte holde teknologien hemmelig.
• Deltakelse i radio- eller TV
  Weman, Helge; Fimland, Bjørn-Ove; Kim, Dong-Chul. (2013) Grafén-Forbløffende superstoff.
• Intervju
  Weman, Helge. (2013) Graphene and Semiconductor Technology Together: Smaller, Cheaper, Better.
• Intervju
  Weman, Helge. (2013) En planlagt tilfeldighet.
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove; Kim, Dong-Chul. (2013) På vei mot noe stort.
• Intervju
  Weman, Helge. (2013) Graphene and semiconductor technology together: smaller, cheaper, better.
• Intervju
  Weman, Helge. (2013) Mirakelmaterialet grafén vil føre til revolusjoner innen teknologi.
• Intervju
  Weman, Helge. (2013) Grafen forstærker lysets kraft.
• Foredrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; KIM, DONG CHUL; Huh, Junghwan; Reinertsen, Johannes F; Ahtapodov, Lyubomir; Fimland, Bjørn-Ove; Weman, Helge; Fauske, Vidar Tonaas; Kauko, Hanne. (2013) Position Controlled GaAs Nanowires on Si using Nanoimprint Lithography. 8th Nanolab usermeeting
• Konferanseforedrag
  Huh, Junghwan; KIM, DONG CHUL; Yun, H.; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kauko, Hanne; Helvoort, Antonius Van; Lee, S.W.; Fimland, Bjørn-Ove; Weman, Helge. (2013) Electrical Characteristics of Individual GaAsSb Nanowires Grown by Molecular Beam Epitaxy. 8th Nanolab usermeeting
• Konferanseposter
  Kauko, Hanne; Munshi, Abdul Mazid; Lim, Cheng Guan; KIM, DONG CHUL; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2013) GaAs/AlGaAs core-shell nanowires for novel solar cell applications. Nanokonferansen 2013
• Konferanseposter
  Kauko, Hanne; Munshi, Abdul Mazid; Lim, Cheng Guan; KIM, DONG CHUL; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2013) GaAs/AlGaAs core-shell nanowires for novel solar cell applications. Norwegian Solar Cell Conferance 2013
• Konferanseforedrag
  Fauske, Vidar Tonaas; KIM, DONG CHUL; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2013) In-situ electrical and structural characterization of individual GaAs nanowire. EMAG2013
• Konferanseposter
  Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; KIM, DONG CHUL; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2013) Site-specific, cross-sectional TEM samples of as-grown nanowires by FIB. NorfFab/MyFab user meeting
• Konferanseforedrag
  Ahtapodov, Lyubomir; Todorovic, Jelena; Reinertsen, Johannes F; Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2013) Optical Characterization of Single Semiconductor Nanowires. MYFAB&NORFAB Meetting
• Konferanseposter
  Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Fauske, Vidar Tonaas; KIM, DONG CHUL; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2013) Epitaxial growth of vertical III-V semiconductor nanowires on graphene. Graphene2013

2012

• Konferanseposter
  Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2012) Site-specific, cross-sectional TEM samples of as-grown nanowires by FIB. 15th EMC
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Dong Chul, KIM; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Epitaxial Growth of High Quality Vertical GaAs Nanowires on Graphene by Molecular Beam Epitaxy. MRS Autumn meeting
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Crystal phase tuning in self-catalyzed GaAs nanowires induced by Ga-droplet contact angle. MBE2012
• Konferanseposter
  Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Christoffersen, Ole Morten; Dong Chul, KIM; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Growth and characterization of Be-doped GaAs nanowires grown by Au- and Ga-assisted molecular beam epitaxy. MBE2012
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Dong Chul, KIM; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) A generic model and experimental demonstration of epitaxial growth of GaAs nanowires on graphene layers. MBE2012
• Konferanseforedrag
  Weman, Helge. (2012) III-V nanowires for high-efficiency solar cells. Transatlantic Science Week. Invited talk at "Nano-enabling technologies"
• Konferanseforedrag
  Todorovic, Jelena; Anthonysamy, Fervin Moses; Ahtapodov, Lyubomir; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2012) Correlation of optical and structural properties of single semiconductor heterostructured nanowires. Scandem 2012
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) GaAs nanowires grown on Si substrates: Crystal phase perfection, heterostructures and position control. 3rd Nano-network Workshop
• Konferanseforedrag
  Ahtapodov, Lyubomir; Snustad, Ingrid; Gulla, Stian; Munshi, Abdul Mazid; Fimland, Bjørn-Ove; Helvoort, Antonius Van; Weman, Helge. (2012) Correlated micro photoluminescence and transmission electron microscopy on single self‐assisted GaAs/AlGaAs core‐shell nanowires. 7th Nanolab usermeeting
• Konferanseposter
  Ahtapodov, Lyubomir; Todorovic, Jelena; Olk, Phillip; mjaaland, T.S.; Slaattnes, P.R.T.; Dasa Lakshmi Narayana, Dheeraj; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Optical Characterization of Single GaAs/AlGaAs Nanowires with Combined Photoluminescence Spectroscopy and Transmission Electron Microscopy on the Same Nanowire. 3rd Nano-network Workshop
• Konferanseforedrag
  Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, Dong Chul; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2012) Transmission Electron Microscopy Study of Defects at the Interface between GaAs Nanowires and a Si-111 Substrate. 3rd Nano-network Workshop
• Konferanseposter
  Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2012) FIB prepared site-specific cross-sectional TEM specimen of nanowire-substrate interfaces. 7th Nanolab usermeeting
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Fauske, Vidar Tonaas; Dong Chul, KIM; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Epitaxial growth of semiconductor III-V nanowires on graphene: A template for future opto-electronic device applications. 7th Nanolab usermeeting
• Konferanseforedrag
  Ahtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Mjåland, Terje Sund; Slåttnes, Patrick Rene Tollefsen; Dasa Lakshmi Narayana, Dheeraj; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Combined micro-photoluminescence and electron microscopy investigation of single GaAs nanowires. ICPS2012
• Konferanseforedrag
  Weman, Helge. (2012) Heterostructured III-V nanowires grown by molecular beam epitaxy for photonic applications. Invited talk in Prof. Ruoff's group at University of Texas, Austin
• Foredrag
  Weman, Helge. (2012) Commercialisation of Nanotechnology. Annual Top level Research program meeting 2012
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2012) De kan revolusjonere verdens datateknologi.
• Konferanseposter
  Kim, Dong-Chul; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2012) Investigation of wurtzite GaAs nanowires by polarization dependent photocurrent spectroscopy. ICPS 2012
• Foredrag
  Weman, Helge. (2012) Semiconductor nanowires on graphene for next generation ICT. ITovation day 2012
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2012) NTNU-oppdagelse kan revolusjonere elektronikkbransjen.
• Konferanseforedrag
  Weman, Helge. (2012) Heterostructured III-V semiconductor nanowires grown by Au and self-catalyzed MBE. Invited talk in Prof. Fukui's group at Hokkaido University, Sapporo
• Intervju
  Weman, Helge. (2012) Supertynt stoff kan strupe solindustrien.
• Konferanseforedrag
  Weman, Helge. (2012) Heterostructured III-V semiconductor nanowires grown by Au and self-catalyzed MBE. Invited talk in Prof. Yi's group at Seoul National University
• Konferanseforedrag
  Weman, Helge. (2012) Heterostructured III-V semiconductor nanowires grown by Au and self-catalyzed MBE. Invited talk in Dr.Notomi's group at NTT Basic Res. Lab, Atsugi
• Intervju
  Weman, Helge. (2012) NTNU-gjennombrudd for nanotråder på grafen.
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2012) Nanohalvledere på grafen revolutionerer solcellers effektivitet.
• Intervju
  Weman, Helge. (2012) Scientists create ultra-thin, cheap, flexible, transparent graphene semiconductors.
• Intervju
  Weman, Helge. (2012) 挪威科研人员成功研制半导体新材料.
• Intervju
  Weman, Helge. (2012) Graphene Replaces Traditional Silicon Substrates in Future Devices.
• Intervju
  Weman, Helge; Fimland, Bjørn-Ove. (2012) De kan revolusjonere verdens datateknologi.
• Intervju
  Weman, Helge. (2012) Researchers claim semiconductors grown on graphene.
• Konferanseposter
  Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, Dong Chul; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2012) Characterization of the Interface between GaAs Nanowires and a 111-Si Substrate. MRS 2012 Spring Meeting
• Konferanseforedrag
  Kim, Dong Chul; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Lim, Cheng Guan; Fauske, Vidar Tonaas; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Semiconductor Nanowire Based Solar Cells-A Nordic Top-level Research Initiative. Technoporten
• Konferanseforedrag
  Kim, Dong Chul; Ahtapodov, Lyubomir; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Photocurrent study of Single Wurtzite AlGaAs-GaAs Core/shell nanowires. MRS 2012 Spring Meeting
• Konferanseforedrag
  Ahtapodov, Lyubomir; Todorovic, Jelena; Olk, Phillip; Kim, Dong Chul; mjaaland, T.S.; Eriksson, M; Dasa Lakshmi Narayana, Dheeraj; Helvoort, Antonius Van; Bergman, P; Fimland, Bjørn-Ove. (2012) Wurtzite versus Zincblende GaAs – A Thorough Comparison. MRS 2012 Spring Meeting
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Kim, Dong Chul; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Zinc blende and wurtzite GaAs nanowires grown by self-catalyzed molecular beam epitaxy. MRS 2012 Spring Meeting
• Foredrag
  Weman, Helge. (2012) Nanoteknologi- Vad er det?. Luftkrigsskolen, Trondheim
• Konferanseforedrag
  Weman, Helge. (2012) Heterostructured III-V nanowires grown by MBE. Invited Seminar in Prof. Xianfen Duan's group at UCLA
• Foredrag
  Weman, Helge. (2012) Halvleder nanotråder. Innovasjon Norge (medisin) besöker Trondheim
• Konferanseforedrag
  Weman, Helge. (2012) Heterostructured III-V semiconductor nanowires for solar cell applications. Invited Seminar in Prof. SangWook Lee's group at Kunkuk Uni, Seoul
• Konferanseforedrag
  Weman, Helge. (2012) III-V Nanowire Solar Cells. Invited talk at 2012 meeting of The Norwegian Research Centre for Solar Cell Technology
• Konferanseforedrag
  Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Munshi, Abdul Mazid; Lim, Cheng Guan; Fauske, Vidar Tonaas; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) III-V semiconductor nanowire based solar cells. Mini‐workshop on materials for solar cells and other optoelectronic applications
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Todorovic, Jelena; Fauske, Vidar Tonaas; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2012) Self-catalyzed GaAs nanowires grown by molecular beam epitaxy. Mini‐workshop on materials for solar cells and other optoelectronic applications

2011

• Konferanseforedrag
  Todorovic, Jelena; Anthonysamy, Fervin Moses; Dasa Lakshmi Narayana, Dheeraj; Olk, Phillip; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2011) Correlated micro-photoluminescence and electron microscopy study of a heterostructured semiconductor nanowire. Microscopy of Semiconducting Materials 2011 (MSM XVII)
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Todorovic, Jelena; karlberg, Thomas; Helvoort, Antonius Van; Dasa Lakshmi Narayana, Dheeraj; Olk, Phillip; Fimland, Bjørn-Ove; Weman, Helge. (2011) Consecutive Photoluminescence and Transmission Electron Microscopy Studies of Single GaAs/AlGaAs Core-shell Nanowires with a GaAsSb Insert. MRS Spring meeting 2011
• Konferanseposter
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Insights into Growth Mechanisms of Self-catalyzed GaAs Nanowires Grown by Molecular Beam Epitaxy. MRS Spring Meeting
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Todorovic, Jelena; Dasa Lakshmi Narayana, Dheeraj; Olk, Phillip; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Consecutive optical and structural characterization of a single heterostructured III-V semiconductor nanowire. 2nd Nano-network Workshop
• Foredrag
  Weman, Helge. (2011) Guest seminar at Sungkyunkwan (Samsung) University: Nanotechnology at NTNU. Nanostudent excursion to Korea 2011
• Konferanseposter
  Munshi, Abdul Mazid; Kim, D.C.; Dasa Lakshmi Narayana, Dheeraj; Todorovic, Jelena; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Positioned self-catalyzed GaAs nanowire arrays on Si substrates grown by molecular beam epitaxy. Nano-network Workshop
• Konferanseposter
  Olk, Phillip; Härtling, Thomas; Dong Chul, KIM; Weman, Helge. (2011) Contacting single nanowires by confocal photodeposition of metal. GDR Nanofils 2011
• Konferanseposter
  Ahtapodov, Lyubomir; Kim, D.C.; Boe, A.B.; Choi, J.W.; Ji, H.; Kim, G. T.; Anthonysamy, Fervin Moses; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2011) Photocurrent spectroscopy of single wurtzite GaAs nanowires. Heraeus seminar on III-V Nanowires
• Konferanseforedrag
  Weman, Helge. (2011) Invited seminar on "Heterostructured III-V nanowires grown byAu-assisted molecular beam epitaxy". Heraeus seminar on III-V Nanowires
• Konferanseforedrag
  Fauske, Vidar Tonaas; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2011) Cross-sectional Electron Microscopy characterization of the interface between GaAs Nanowires and a Si Substrate. 6th Nanolab usermeeting
• Konferanseforedrag
  Kauko, Hanne; Grieb, Tim; Rosenauer, A.; Bjørge, Ruben; Munshi, Abdul Mazid; Weman, Helge; Helvoort, Antonius Van. (2011) Composition analysis of heterostructured GaAs nanowires with quantitative HAADF-STEM. 6th Nanolab usermeeting
• Konferanseforedrag
  Ahtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Mjåland, Terje Sund; Eriksson, M.; Bergman, P; Dasa Lakshmi Narayana, Dheeraj; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Combined studies of single Au-assisted GaAs/AlGaAs core/shell nanowires with PL spectroscopy and TEM. PDI Topical Workshop on MBE-grown Arsenide Nanowires
• Konferanseforedrag
  Dasa Lakshmi Narayana, Dheeraj; Munshi, Abdul Mazid; Dong Chul, KIM; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Controlling crystal phases in GaAs nanowires grown by Au- and Ga-assisted MBE. PDI Topical Workshop on MBE-grown Arsenide Nanowires
• Konferanseforedrag
  Weman, Helge. (2011) Invited seminar: Heterostrucured III-V nanowires grown by Au- and self-assisted molecular beam epitaxy. PDI Topical Workshop on MBE-grown arsenide nanowires
• Foredrag
  Weman, Helge. (2011) Guest seminar at Korea University: Nanotechnology at NTNU. Nanostudent excursion to Korea 2011
• Foredrag
  Weman, Helge. (2011) Guest seminar at Seoul National University: Nanotechnology at NTNU. Nanostudent excursion to Korea 2011
• Foredrag
  Weman, Helge. (2011) Guest seminar at KAIST: Nanotechnology at NTNU. NTNU-KAIST nanotechnology workshop
• Foredrag
  Weman, Helge. (2011) Guest seminar at POSTECH: Nanotechnology at NTNU. Nanostudent excursion to Korea 2011
• Konferanseforedrag
  Weigand, Christian Carl; Skåre, Daniel; Tveit, Johannes; Ladam, Cecile; Holmestad, Randi; Grepstad, Jostein; Weman, Helge. (2011) Growth of ZnO nanostructures on c- and a-plane sapphire by Au-assisted pulsed laser deposition. GDR Semiconductor Nanowires and Nanotubes
• Konferanseforedrag
  Olk, Phillip; Härtling, Thomas; Dong Chul, KIM; Weman, Helge. (2011) All-optical contacting of single nanowires by confocal photodeposition of metal. Materials Res. Soc. 2011 Fall Meeting, Symposium BB: Functional Nanowires and Nanotubes
• Konferanseforedrag
  Weman, Helge. (2011) Invited seminar: III-V nanowires for high-efficiency solar cells. Norway-China Workshop on Nanotechnology for renewable energy materials
• Konferanseforedrag
  Weman, Helge. (2011) Semiconductor nanowire based solar cells-A Nordic top-level research initiative. 24th Nordic semiconductor meeting
• Konferanseforedrag
  Ahtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Ericsson, M.; Dasa Lakshmi Narayana, Dheeraj; Helvoort, Antonius Van; Bergman, J.P.; Fimland, Bjørn-Ove; Weman, Helge. (2011) Optical properties of Wurtzite GaAs nanowires. GDR Semiconductor Nanowires and Nanotubes
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Periodic arrays of self-catalyzed heterostructured GaAs nanowires on Si substrates grown by molecular beam epitaxy. GDR Semiconductor Nanowires and Nanotubes
• Konferanseforedrag
  Dong Chul, KIM; Christoffersen, Ole Morten; Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Ahtapodov, Lyubomir; Fimland, Bjørn-Ove; Weman, Helge. (2011) Nanofabrication of GaAs nanowire optoelectronic devices in NTNU NanoLab. 6th NanoLab user meeting
• Konferanseforedrag
  Ahtapodov, Lyubomir; Olk, Phillip; Todorovic, Jelena; Mjåland, Terje Sund; Dasa Lakshmi Narayana, Dheeraj; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Optical characterization of single semiconductor nanowires. 6th NanoLab user meeting
• Konferanseposter
  Dong Chul, KIM; Ahtapodov, Lyubomir; Boe, A.B.; Choi, J.W.; Kim, G. T.; Ji, H; Anthonysamy, Fervin Moses; Dasa Lakshmi Narayana, Dheeraj; Fimland, Bjørn-Ove; Weman, Helge. (2011) Photocurrent spectroscopy of single wurtzite GaAs nanowires. Heraeus seminar on III-V Nanowires
• Konferanseforedrag
  Weman, Helge. (2011) Invited seminar: Heterostructured III-V nanowires grown by MBE. IBM seminar series
• Konferanseforedrag
  Munshi, Abdul Mazid; Dasa Lakshmi Narayana, Dheeraj; Dong Chul, KIM; Todorovic, Jelena; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2011) Crystal phase and position control of self-catalyzed GaAs nanowires grown on a Si substrate. 6th NanoLab user meeting

2010

• Konferanseposter
  Weigand, Christian Carl; Grepstad, Jostein; Bergren, Matt; Weman, Helge; Furtak, Tom; Collins, Reuben; Fagerberg, Ragnar; Ladam, Cecile; Vullum, Per Erik; Dahl, Øystein. (2010) ZnO nanostructures grown by pulsed laser deposition. 1st Annual Workshop of the Norwegian PhD Network on Nanotechnology for Microsystems
• Konferanseposter
  Weigand, Christian Carl; Grepstad, Jostein; Weman, Helge; Ladam, C.; Vullum, Per Erik; Dahl, Øystein; Bergren, M.R.; Collins, R.T.; Furtak, T.E.; Tveit, Johannes. (2010) ZnO nanosheets grown by pulsed laser deposition. 5th Nanowire Growth Workshop
• Konferanseposter
  Kim, D.C.; Ahtapodov, Lyubomir; Boe, A.B.; Choi, J.W.; Ji, H.; Kim, G.T.; Anthonysamy, Fervin Moses; Dasa, Lakshmi Narayana; Fimland, Bjørn-Ove; Weman, Helge. (2010) Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires. 30th International Conf. on the Physics of Semiconductors
• Konferanseposter
  Ahtapodov, Lyubomir; Anthonysamy, Fervin Moses; Kim, D.C.; Olk, Phillip; Hoang, Thang Ba; Weman, Helge. (2010) The Nanophotonics Lab at NTNU: A Cool place for Small things with a Bright future. Norwegian Electro-Optics meeting
• Konferanseposter
  Dong Chul, KIM; Ahtapodov, Lyubomir; Bø, A. B; Choi, J. W.; Ji, H.; Kim, G. T.; Moses, A. F.; Dheeraj, D.L.; Fimland, Bjørn-Ove; Weman, Helge. (2010) Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires. ICPS 2010
• Konferanseposter
  Ladam, C.; Weman, Helge; Thomassen, M. Vetaas; Weigand, Christian Carl; Røyset, Arne. (2010) Photoluminescence characterization of ZnO nanorods. Norwegian Electro-Optics meeting
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Tuning of the crystal phase in III-V nanowires grown by Au-assisted molecular beam epitaxy. MRS Spring meeting
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Ahtapodov, Lyubomir; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Micro-photoluminescence spectroscopy and imaging of single axial and radial heterostructured III-V nanowires. Norwegian electro-Optics meeting
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Growth of heterostructured III-V semiconductor nanowires by molecular beam epitaxy. Nano-network workshop 2010
• Konferanseforedrag
  Weman, Helge. (2010) Heterostructured III-V nanowires for photonic applications. Invited seminar Seoul National University, Korea
• Konferanseforedrag
  Weman, Helge. (2010) Heterostructured III-V nanowires for photonic applications. Invited seminar Samsung Electronics,Korea
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Munshi, Abdul Mazid; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. 16th International Conference on Molecular Beam Epitaxy
• Konferanseposter
  Dasa, Lakshmi Narayana Dheeraj; Munshi, Abdul Mazid; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Control of wurtzite and zinc blende crystal phases in single GaAs nanowires grown by Au-assisted molecular beam epitaxy. 5th Nanowire growth workshop
• Konferanseforedrag
  Weman, Helge. (2010) Heterostructured III-V nanowires for photonic applications. Invited seminar Korea University, Seoul-Korea
• Konferanseposter
  Anthonysamy, Fervin Moses; Hoang, Thang Ba; Ahtapodov, Lyubomir; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Photoluminescence polarization anisotropy in a single heterostructured III-V nanowire with mixed crystal phases. 30th International Conference on the Physics of Semiconductors (ICPS 2010)
• Konferanseforedrag
  Furtak, T.E.; Baker, D.J.; Weigand, Christian Carl; Adamson, Jamie M.; Allen, C.G.; Yocom, A.E.; Patterson, L.S.; Weman, Helge; Ladam, C.; Olson, D.C.. (2010) Surface Modification of Zinc Oxide Anodes in Organic Solar Cells. MRS Spring meeeting
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Munshi, Abdul Mazid; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Tuning of the crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. 5th NanoLab user meeting
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Hoang, Thang Ba; Ahtapodov, Lyubomir; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Engineering photoluminescence polarization in a single semiconductor nanowire. 5th NanoLab user meeting
• Konferanseforedrag
  Weigand, Christian Carl; Ladam, C.; Bergren, Matt; Tveit, Johannes; Vullum, Per Erik; Dahl, Øystein; Fagerberg, Ragnar; Collins, R.T.; Furtak, T.E.; Grepstad, Jostein. (2010) ZnO nanostructures grown by pulsed laser deposition. 5th NTNU Nanolab Users Mtg.
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Munshi, Abdul Mazid; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van. (2010) Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. 5th nanowire growth workshop
• Konferanseforedrag
  Weigand, Christian Carl; Baker, D.J.; Adamson, Jamie M.; Allen, C.G.; Bergren, M.R.; Steirer, K.X.; Olson, D.C.; Ladam, C.; Ginley, D.S.; Collins, R.T.. (2010) ZnO nanorod hybrid Organic/Inorganic Solar Cells and the effect of surface modifications. Renewable Energy Research Conference
• Konferanseforedrag
  Ahtapodov, Lyubomir; Anthonysamy, Fervin Moses; Olk, Phillip; Kim, D.C.; Weman, Helge. (2010) The Nanophotonics Lab at NTNU: A Cool Place for Small Things with a Bright Future. 5th NanoLab user meeting
• Konferanseforedrag
  Weman, Helge. (2010) Heterostructured III-V nanowires with mixed crystal phases. Invited seminar University of California Los Angeles
• Konferanseforedrag
  Weman, Helge. (2010) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for bandstructure engineering. Invited seminar University of California San Diego
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2010) Growth of heterostructured III-V nanowires by molecular beam epitaxy for photonic applications. Photonics West
• Konferanseforedrag
  Weman, Helge. (2010) Structural and optical properties of single III-V nanowires with different crystal phases. Invited seminar at NorPRINS workshop, Oslo
• Konferanseforedrag
  Svendsen, Guro Kristin; Weman, Helge; Skaar, Johannes. (2010) Modelling of reflection properties of nanowire lasers. Norwegian Electro-Optics Meeting 2010

2009

• Konferanseforedrag
  Weman, Helge. (2009) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for band structure engineering. Invited Physics Seminar at Univ. of Cincinnati
• Konferanseforedrag
  Weman, Helge. (2009) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for band structure engineering. Post deadline talk at Third International Conference on One-dimensional Nanomaterials, Atlanta, USA
• Konferanseforedrag
  Weman, Helge. (2009) Challenges and possibilities of heterostructured semiconductor nanowires for photonic device applications. NTNU NanoLab Seminarseries
• Foredrag
  Weman, Helge. (2009) Elektronikk, IT og IKT. Invitert foredrag til Ukekonferansen ved UKA09
• Konferanseposter
  Svendsen, Guro Kristin; Dupertuis, M.-A.; Weman, Helge; Skaar, Johannes. (2009) Modeling of electronic and optical properties of heterostructured semiconductor nanowires. NANOMAT conference 2009
• Konferanseforedrag
  Weman, Helge. (2009) Micro-photoluminescence study of hetero-structured GaAs/AlGaAs and GaAs/GaAsSb nanowires grown by molecular beam epitaxy. Invited talk at Int. Conf. on Transport and Optical Properties of Nanomaterials, Allahabad, India
• Intervju
  Weman, Helge. (2009) Åpning av NTNU NanoLab.
• Konferanseforedrag
  Weman, Helge. (2009) Heterostructured III-V nanowires for photonic applications. Invited seminar at Kavli Institute of Nanoscience, Delft TU
• Konferanseforedrag
  Weman, Helge. (2009) Heterostructured III-V nanowires with mixed crystal phases: New possibilities for band-structure engineering. Invited seminar at IBM Zurich Research Lab.
• Konferanseforedrag
  Weman, Helge. (2009) Heterostructured III-V nanowires for photonic applications. Invited talk at FFI Material worskhop
• Intervju
  Weman, Helge. (2009) Satser mye på lite.
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Hoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Heterostructured III-V Nanowires with Mixed Crystal Phases: New Possibilities for Heterostructure Engineering. Nordic Semiconductor Meeting
• Konferanseforedrag
  Zhou, Hailong; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Anthonysamy, Fervin Moses; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge; Patriarche, G; Harmand, J.C.. (2009) Self-organized wurtzite AlGaAs core-shell nanowires with GaAs inserts grown by molecular beam epitaxy. GdR Nanofils et Nanotubes Semiconducteurs - Workshop 2009
• Konferanseforedrag
  Weman, Helge. (2009) Heterostructured wurtzite/zinc-blende GaAs/GaAsSb core-shell nanowires: New possibilities for band-structure engineering in nanowires. Invited talk at 2009 RCIQE International Seminar on Advanced Semiconductor Materials and Devices, Sapporo, Japan
• Konferanseposter
  Zhou, Hailong; Dasa, Lakshmi Narayana; Hoang, Thang Ba; Anthonysamy, Fervin Moses; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Characterization of heterostructured III-V nanowires grown by molecular beam epitaxy. 4th NTNU Nanolab User Meeting
• Konferanseposter
  Dasa, Lakshmi Narayana; Rogstad, Espen; Scheffler, Martha; Helvoort, Antonius Van; Zhou, Hailong; Patriarche, G.; Harmand, J.C.; Fimland, Bjørn-Ove; Weman, Helge. (2009) Diffusion-limited growth of GaAs nanowires by Au-assisted molecular beam epitaxy. 4th GDR meeting
• Konferanseforedrag
  Helvoort, Antonius Van; Dasa, Lakshmi Narayana; Grønsberg, Sondre; Patriarche, G.; Zhou, Hailong; Fimland, Bjørn-Ove; Weman, Helge. (2009) Dark field transmission electron microscopy techniques for structural characterization of semiconductor nanowire heterostructures. EMAG 2009
• Konferanseforedrag
  Weigand, Christian Carl; Bergren, Matt; Ladam, Cecile; Vullum, Per Erik; Walmsley, John C; Fagerberg, Ragnar; Furtak, Tom; Collins, Reuben; Grepstad, Jostein; Weman, Helge. (2009) Characterization of ZnO Nanostructures Grown by Pulsed Laser Deposition. MRS Spring Meeting 2009
• Konferanseposter
  Dasa, Lakshmi Narayana; Patriarche, G; Helvoort, Antonius Van; Zhou, Hailong; Fimland, Bjørn-Ove; Weman, Helge. (2009) Growth and structural characterization of axial heterostructured GaAs/GaSb nanowires grown by molecular beam epitaxy. 3rd International conf. on One-dimensional Nanomaterials
• Konferanseposter
  Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Anthonysamy, Fervin Moses; Zhou, Hailong; Hoang, Thang Ba; Fimland, Bjørn-Ove; Weman, Helge. (2009) Effect of growth-interruption on structural and optical properties of GaAs/GaAsSb axial heterostructured nanowires. Materials Res. Soc. 2009 Fall Meeting, Symposium M: Multifunction at the Nanoscale through Nanowires
• Konferanseposter
  Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Anthonysamy, Fervin Moses; Zhou, Hailong; Hoang, Thang Ba; Fimland, Bjørn-Ove; Weman, Helge. (2009) Optimization of heterointerfaces in axial heterostructured nanowires grown by molecular beam epitaxy. 4th Nanowire growth workshop
• Konferanseposter
  Skåre, Daniel; Weigand, Christian Carl; Ladam, Cecile; Vardøy, Astrid-Sofie Borge; Dahl, Øystein; Bergren, Matt; Fagerberg, Ragnar; Weman, Helge; Grepstad, Jostein; Furtak, Tom. (2009) Pulsed laser deposition of ZnO nanostructures for hybrid inorganic/organic solar cells. Renewable Energy R&D-seminar, OPV2009: PV-materials
• Foredrag
  Svendsen, Guro Kristin; Dupertuis, M.-A.; Weman, Helge; Skaar, Johannes. (2009) Modeling of optical and electronic properties of semiconductor nanowires. Northern optics 2009
• Konferanseforedrag
  Helvoort, Antonius Van; Dasa, Lakshmi Narayana; Grønsberg, Sondre; Patriarche, G.; Zhou, Hailong; Hoang, Thang Ba; Anthonysamy, Fervin Moses; Fimland, Bjørn-Ove; Weman, Helge. (2009) Semiconductor nanowire heterostructures characterization by dark field TEM. 4th NTNU Nanolab User Meeting
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Zhou, Hailong; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Micro-photoluminescence study of single GaAsSb/GaAs radial and axial heterostructured core-shell nanowires. E-MRS 2009
• Konferanseforedrag
  Hoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Wurtzite GaAs and zinc blende GaAsSb nanowires: New possibilities for heterostructure engineering. NANOMAT conference 2009
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Zhou, Hailong; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Optical properties of axial and radial heterostructured III-V semiconductor nanowires. 4th NTNU Nanolab User Meeting
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Rogstad, Espen; Scheffler, Martha; Fimland, Bjørn-Ove; Weman, Helge. (2009) Tailoring of semiconductor heterostructure nanowires for photonic applications by molecular beam epitaxy. 4th NTNU Nanolab User Meeting
• Konferanseforedrag
  Røyset, Arne; Fagerberg, Ragnar; Weman, Helge. (2009) Cool, Small and Bright: cryogenic micro-photoluminescence for photovoltaic materials. Renewable Energy R&D-seminar, OPV2009: PV-materials
• Konferanseforedrag
  Hoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Crystal phase dependent photoluminescence polarization in single semiconductor nanowires. 3rd International conf. on One-dimensional Nanomaterials
• Konferanseforedrag
  Ladam, Cecile; Weigand, Christian Carl; Skåre, Daniel; Vardøy, Astrid-Sofie Borge; Dahl, Øystein; Bergren, Matt; Fagerberg, Ragnar; Weman, Helge; Furtak, T.E.; Collins, Reuben. (2009) Nanostructured ZnO layers grown by pulsed laser deposition for hybrid inorganic/organic solar cells. NANOMAT conference 2009
• Konferanseforedrag
  Hoang, Thang Ba; Anthonysamy, Fervin Moses; Zhou, Hailong; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2009) Polarized micro-photoluminescence imaging of single GaAs/AlGaAs core-shell nanowires with GaAsSb inserts. Materials Res. Soc. 2009 Fall Meeting, Symposium O: Excitons and Plasmon Resonances in Nanostructures II
• Konferanseforedrag
  Weman, Helge. (2009) Semiconductor nanowires for solar cell applications. 4th KIFEE Symposium on Environment, Energy, Materials and Education

2008

• Konferanseposter
  Weigand, Christian Carl; Bergren, M.R.; Valset, K.; Carey, D.; Fagerberg, Ragnar; Ladam, C.; Grepstad, Jostein; Weman, Helge; Allen, C.G.; Baker, D.J.. (2008) Characterization of ZnO layers grown by pulsed laser deposition for hybrid inorganic/organic solar cells. 1st Intl. Nanosymposium@NTNU
• Konferanseforedrag
  Hoang, Thang Ba; Dasa, Lakshmi Narayana; Patriarche, G.; Anthonysamy, Fervin Moses; Zhou, Hailong; Helvoort, Antonius Van; Harmand, J.C.; Fimland, Bjørn-Ove; Weman, Helge. (2008) Growth and characterization of single wurtzite GaAs nanowires with defect-free zinc blende GaAsSb inserts. Materials Res. Soc. 2008 Fall Meeting, Symposium LL: Nanowires - Synthesis, Properties, Assembly, and Applications
• Konferanseforedrag
  Weigand, Christian Carl; Valset, K.; Fagerberg, Ragnar; Ladam, C.; Grepstad, Jostein; Weman, Helge; Allen, C.G.; Baker, D.J.; Furtak, T.E.; Collins, R.T.. (2008) Pulsed laser deposition growth of ZnO nanostructures for electron transport in hybrid inorganic/organic solar cells. 3rd Nanolab User Meeting
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Hoang, Thang Ba; Dasa, Lakshmi Narayana; Fimland, Bjørn-Ove; Weman, Helge; Karlsson, K.F.; Holtz, P.O.. (2008) Investigation of the structural and optical properties of single GaAs/GaAsSb/GaAs nanowire quantum dots. 17th Int. Laser Physics Workshop
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Dasa, Lakshmi Narayana; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge; Karlsson, K.F.; Holtz, P.O.. (2008) Photoluminescence study of GaAs-based nanowires grown by molecular beam epitaxy. 3rd NTNU Nanoscience & Nanotechnology workshop
• Konferanseforedrag
  Anthonysamy, Fervin Moses; Dasa, Lakshmi Narayana; Fimland, Bjørn-Ove; Weman, Helge; Karlsson, K.F.; Holtz, P.O.. (2008) Radiative emission from a type-II GaAsSb segment in a single GaAs nanowire. 15th Int. Conf. on Superlattices, Nanostructures and Nanodevices
• Konferanseforedrag
  Zhou, Hailong; Dasa, Lakshmi Narayana; Hoang, Thang Ba; Anthonysamy, Fervin Moses; Fimland, Bjørn-Ove; Weman, Helge; Helvoort, Antonius Van; Liu, L.; Harmand, J.C.. (2008) Growth, structural and optical characterizations of GaAs/AlGaAs core-shell nanowires. 3rd Int. Workshop on Nanowire Growth Mechanisms
• Konferanseforedrag
  Dasa, Lakshmi Narayana; Patriarche, G.; Zhou, Hailong; Anthonysamy, Fervin Moses; Harmand, J.C.; Fimland, Bjørn-Ove; Weman, Helge. (2008) Growth and characterization of GaAs nanowires with GaAsSb inserts grown by molecular beam epitaxy. 15th International Conference on Molecular Beam Epitaxy
• Konferanseforedrag
  Svendsen, Guro Kristin; Weman, Helge; Skaar, Johannes. (2008) Modal reflection properties of nanowire waveguides. 17th Int. Laser Physics Workshop
• Konferanseposter
  Anthonysamy, Fervin Moses; Dasa, Lakshmi Narayana; Fimland, Bjørn-Ove; Weman, Helge; Karlsson, K.F.; Holtz, P.O.. (2008) Micro-photoluminescence study of heterostructured GaAs/AlGaAs and GaAs/GaAsSb nanowires grown by molecular beam epitaxy. 1st Int. Nanosymposium@NTNU
• Konferanseposter
  Dasa, Lakshmi Narayana; Patriarche, G.; Zhou, Hailong; Anthonysamy, Fervin Moses; Hoang, Thang Ba; Helvoort, Antonius Van; Harmand, J.C.; Fimland, Bjørn-Ove; Weman, Helge. (2008) Growth and characterization of heterostructured III-V nanowires by molecular beam epitaxy. 1st Int. Nanosymposium@NTNU
• Konferanseposter
  Svendsen, Guro Kristin; Weman, Helge; Skaar, Johannes. (2008) Modeling of modal properties of nanowire lasers. Norwegian Electro-Optics meeting
• Konferanseposter
  Anthonysamy, Fervin Moses; Dasa, Lakshmi Narayana; Fimland, Bjørn-Ove; Weman, Helge; Karlsson, K.F.; Holtz, P.O.. (2008) Micro-photoluminescence study of heterostructured GaAs/AlGaAs and GaAs/GaAsSb nanowires grown by molecular beam epitaxy. 29th Int. Conf. on the Physics of Semiconductors
• Konferanseposter
  Weigand, Christian Carl; Bergren, M.R.; Valset, K.; Carey, D.; Fagerberg, Ragnar; Ladam, C.; Grepstad, Jostein; Weman, Helge; Allen, C.G.; Baker, D.J.. (2008) Characterization of ZnO thin films grown by pulsed laser deposition for hybrid inorganic/organic solar cells. 23rd European Photovoltaic Solar Energy Conference
• Konferanseposter
  Dasa, Lakshmi Narayana; Zhou, Hailong; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge; Patriarche, G.; Harmand, J.C.. (2008) A novel effect of Sb on the crystalline structure of GaAs nanowires grown by MBE. 3rd Int. Workshop on Nanowire Growth Mechanisms
• Konferanseposter
  Baker, D.J.; Allen, C.G.; Albin, J.M.; Oertli, H.E.; Bergren, M.R.; Berman, T.D.; Furtak, T.E.; Collins, R.T.; Olson, D.C.; White, M.S.. (2008) Functionalized zinc oxide for improved organic photovoltaic systems. Mat. Res. Soc. 2008 Fall Mtg., Symposium H: Physics and Technology of Organic Semiconductor Devices

2007

• Konferanseforedrag
  Weman, Helge. (2007) Nanostructured materials for photonic applications. AIST-Norway Nano symposium
• Konferanseforedrag
  Weman, Helge. (2007) Semiconductor quantum-wires and nano-wires for optoelectronic applications. International Conference on Optical, Optoelectronic and Photonic Materials and Applications
• Konferanseposter
  Dheeraj, D.L.; Nilsen, Tron Arne; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2007) Fabrication and characterization of GaAs nanowires grown by molecular beam epitaxy. 2nd NTNU Nanoscience & Nanotechnology workshop
• Konferanseposter
  Dheeraj, D.L.; Nilsen, Tron Arne; Helvoort, Antonius Van; Fimland, Bjørn-Ove; Weman, Helge. (2007) Fabrication and structural characterization of GaAs nanowires grown by molecular beam epitaxy. NANOMAT Conference
• Konferanseposter
  Dheeraj, D.L.; Sartel, C.; Travers, L.; Harmand, J.C.; Patriarche, G.; Fimland, Bjørn-Ove; Weman, Helge. (2007) Importance of initial growth conditions during the growth of III-V nanowires by molecular beam epitaxy. 2nd International Conf. on One-dimensional Nanomaterials
• Konferanseposter
  Lyo, S.K.; Karlsson, F.K.; Weman, Helge; Leifer, K.; Rudra, A.; Kapon, E.. (2007) Exciton energy transfer in confined systems: Effect of the dimensionality. International Complex Adaptive Materials Workshop

2006

• Konferanseforedrag
  Weman, Helge. (2006) Fabrication and characterization of nanophotonic structures and devices. 1st NTNU NanoLab User Meeting
• Konferanseforedrag
  Weman, Helge; Karlsson, F.K.; Lyo, S.K.; Leifer, K.; Rudra, A.; Kapon, E.. (2006) Exciton transfer efficiency between asymmetric coupled GaAs V-groove quantum wires. Annual Meeting of The Condensed Matter Physics with Atomic Physics Division of the Norwegian Physical Society
• Konferanseforedrag
  Lyo, S.K.; Karlsson, F.K.; Weman, Helge; Rudra, A.; Kapon, E.. (2006) Exciton energy transfer between asymmetric quantum wires. March Meeting of the American Physical Society
• Konferanseforedrag
  Weman, Helge; Palmgren, S.; Reichardt, H.; Karlsson, F.K.; Rudra, A.; Kapon, E.. (2006) Photonic V-groove quantum wire devices. Northern Optics
• Konferanseforedrag
  Weman, Helge. (2006) Semiconductor quantum-wires and nano-wires for photonic applications. Prof. H.J. Mooij Nanoscience-Nanotechnology Seminar
• Konferanseposter
  Palmgren, S.; Weman, Helge; Schoenberg, A.; Karlsson, F.K.; Rudra, A.; Kapon, E.. (2006) Optical absorption spectra in V-groove quantum wires: Experiment and theory. Northern Optics

2005

• Konferanseforedrag
  Weman, Helge. (2005) Nano-photonic devices based on self-ordered growth on V-grooved GaAs substrates. Kollokvium
• Konferanseforedrag
  Weman, Helge; Palmgren, S.; Reichardt, H.; Karlsson, F.K.; Kapon, E.. (2005) V-groove quantum wire emitters and modulators. Conference in Materials Science
• Konferanseposter
  Palmgren, S.; Reichardt, H.; Weman, Helge; Schoenberg, A.; Pelucchi, E.; Rudra, A.; Karlsson, F.K.; Leifer, K.; Kapon, E.. (2005) V-groove quantum wire waveguide devices. 11th European Workshop on Metalorganic Vapour Phase Epitaxy
• Konferanseposter
  Karlsson, F.K.; Weman, Helge; Lyo, S.K.; Rudra, A.; Kapon, E.. (2005) Strongly reduced carrier/exciton transfer efficiency between parallel quantum wires: a comparison with quantum wells. 12th International Conference on Modulated Semiconductor Structures
• Konferanseposter
  Weman, Helge; Palmgren, S.; Reichardt, H.; Schoenberg, A.; Pelucchi, E.; Rudra, A.; Karlsson, F.K.; Leifer, K.; Kapon, E.. (2005) V-groove quantum wire devices. 1st International Symposium on Semiconductor Nanowires