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Semiconductor and Material Spectroscopy Laboratory
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2018

  1. Publications
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Fabrication and optical characterization of GaN waveguides on (−201)-oriented β-Ga2O3
Year: 2018 DOI:https://doi.org/10.1364/OME.8.000088
Authors: Kashif M Awan, Mufasila M Muhammad, Madhavi Sivan, Spencer Bonca, Iman S Roqan, Ksenia Dolgaleva
  • Fabrication and optical characterization of GaN waveguides on (−201)-oriented β-Ga2O3
Highly Stable and Ultrafast Hydrogen Gas Sensor Based on 15 nm Nanogaps Switching in a Palladium–Gold Nanoribbons Array
Year: 2018
Authors: Gun‐Young Jung usin Pak, Yeonggyo Jeong, Naresh Alaal, Hyeonghun Kim, Jeonghoon Chae, Jung‐Wook Min, Assa Aravindh Sasikala Devi, Somak Mitra, Da Hoon Lee, Yogeenth Kumaresan, Woojin Park, Tae‐Wook Kim, Iman S Roqan
  • Highly Stable and Ultrafast Hydrogen Gas Sensor Based on 15 nm Nanogaps Switching in a Palladium–Gold Nanoribbons Array
Enhanced Performance of MoS2 Photodetectors by Inserting an ALD‐Processed TiO2 Interlayer
Year: 2018 DOI:https://doi.org/10.1002/smll.201703176
Authors: Yusin Pak, Woojin Park, Somak Mitra, Assa Aravindh Sasikala Devi, Kalaivanan Loganathan, Yogeenth Kumaresan, Yonghun Kim, Byungjin Cho, Gun‐Young Jung, Muhammad M Hussain, Iman S Roqan
  • Enhanced Performance of MoS2 Photodetectors by Inserting an ALD‐Processed TiO2 Interlayer
Photonics: Enhanced Performance of MoS2 Photodetectors by Inserting an ALD‐Processed TiO2 Interlayer (Small 5/2018)
Year: 2018 DOI:https://doi.org/10.1002/smll.201870022
Authors: Yusin Pak, Woojin Park, Somak Mitra, Assa Aravindh Sasikala Devi, Kalaivanan Loganathan, Yogeenth Kumaresan, Yonghun Kim, Byungjin Cho, Gun‐Young Jung, Muhammad M Hussain, Iman S Roqan
  • Photonics: Enhanced Performance of MoS2 Photodetectors by Inserting an ALD‐Processed TiO2 Interlayer (Small 5/2018)
GaN/AlGaN multiple quantum wells grown on transparent and conductive (-201)-oriented β-Ga2O3 substrate for UV vertical light emitting devices
Year: 2018 DOI:https://doi.org/10.1063/1.5025178
Authors: Idris A Ajia, Y Yamashita, K Lorenz, MM Muhammed, L Spasevski, Dhaifallah Almalawi, J Xu, K Iizuka, Y Morishima, Dalaver H Anjum, Nini Wei, RW Martin, A Kuramata, Iman S Roqan
  • GaN/AlGaN multiple quantum wells grown on transparent and conductive (-201)-oriented β-Ga2O3 substrate for UV vertical light emitting devices
Extremely reduced dielectric confinement in two-dimensional hybrid perovskites with large polar organics
Year: 2018
Authors: Bin Cheng, Ting-You Li, Partha Maity, Pai-Chun Wei, Dennis Nordlund, Kang-Ting Ho, Der-Hsien Lien, Chun-Ho Lin, Ru-Ze Liang, Xiaohe Miao, Idris A Ajia, Jun Yin, Dimosthenis Sokaras, Ali Javey, Iman S Roqan, Omar F Mohammed, Jr-Hau He
  • Extremely reduced dielectric confinement in two-dimensional hybrid perovskites with large polar organics
Tuning the electronic properties of hexagonal two-dimensional GaN monolayers via doping for enhanced optoelectronic applications
Year: 2018 DOI:https://doi.org/10.1021/acsanm.8b01852
Authors: Naresh Alaal, Iman S Roqan
  • Tuning the electronic properties of hexagonal two-dimensional GaN monolayers via doping for enhanced optoelectronic applications
Understanding the origins of ultralong radiative states in metal halide perovskite crystals
Year: 2018
Authors: Erkki Alarousu , Ahmed El-Zohry, Kwangjae Lee, Bekir Turedi, Ibrahim Dursun, Jun Yin, Ayan Zhumekenov, Somak Mitra, Iman Salem Roqan, Chen Yang , Anton Malko, Mohammed Omar, Osman Bakr
  • halide perovskite crystals
Patent: Synthesis of vertically aligned metal oxide nanostructures
Year: 2018
Authors: Iman Salem Roqan, Tahani Hassan Flemban
  • Nanostructures
Scalable integration of periodically aligned 2D-MoS2 nanoribbon array
Year: 2018
Authors: Yusin Pak, Yonghum Kim, N. Lim, J-W Min, Woojin Park, W. Kim, Y. Jeong, H. Kim, Somak Mitra, B. Xin, T-W Kim, Iman Salem Roqan, Byungjin Cho, Gun-Young Jung, K. Kim
  • Two-dimensional (2D) Molybdenum Disulfide
GaN/AlGaN multiple quantum wells grown on transparent and conductive −201-oriented β-Ga2O3 substrate for UV vertical light emitting devices
Year: 2018
Authors: Idris A. Ajia, Y. Yamashita, K. Lorenz, M.M. Muhammed, L. Spasevski, D. Almalawi, Jian Xu, K. Lizuka, Y. Morishima, DH Anjum, N. Wei, R.W. Martin, A. Kuramata, Iman Salem Roqan
  • III-nitride semiconductors
Freestanding patterned polycrystalline GaN substrate by a straightforward and affordable technique
Year: 2018
Authors: N. Zainal, MEA Samsudin, Muhamad Ikram Md Taib, MA. Ahmad, A. Ariff, N. Alwadai, Iman Salem Roqan
  • GaN
​Analysis on the energetics, magnetism and electronic properties in a 45° ZnO grain boundary doped with Gd
Year: 2018
Authors: Assa Aravindh, Iman Salem Roqan
  • Magnetism
  • ZnO
High-performance solar-blind flexible deep-UV photodetectors based on quantum dots synthesized by femtosecond-laser ablation
Year: 2018
Authors: Somak Mitra, Assa Aravindh, Gobind Das, Yusin Pak, Idris A. Ajia, Kalaivanan Loganathan, Enzo Di Fabrizio, Iman Salem Roqan
  • Deep-Ultraviolet DUV
  • Femtosecond-laser ablation in liquid
  • Flexible photodetector
  • Quantum dots QDs
  • ZnO Zinc nitride
Carrier dynamics of InxGa1-xN/GaN multiple quantum wells grown on (−201) β-Ga2O3 for bright vertical light emitting diodes
Year: 2018
Authors: Mufasila Mumthaz Muhammed, Jian Xu, Nimer Wehbe, Iman Salem Roqan
  • Optoelectronics
  • Spectroscopy
  • Time-resolved
  • Multiple Quantum Well
Surface-Passivated AlGaN Nanowires for Enhanced Luminescence of Ultraviolet Light Emitting Diodes
Year: 2018
Authors: Haiding Sun, Mohammad Khaled Shakfa, Mufasila Mumthaz Muhammed, Bilaj Janjua, Kuang-Hui Li, Ronghui Lin, Tien Khee Ng, Iman Salem Roqan, Boon S. Ooi, Xiaohang Li
  • Aluminum Gallium Nitride Nanowire
  • passivation
  • Potassium Hydroxide
  • Surface Oxides and States
  • Surface Recombination
  • Ultraviolet Light Emitting Diode
Fabrication and optical characterization of GaN waveguides on −201 -oriented b Ga2O3
Year: 2018
Authors: Ashif M. Awan, M.M. Muhammed, Madhavi Sivan, Spencer Bonca, Iman Salem Roqan, Ksenia Dolgaleva
  • GaN
Generated carrier dynamics in V-pit enhanced InGaN/GaN light emitting diode
Year: 2018
Authors: Idris A. Ajia, E. Belekov, M. A. Roldan, N. Wei, Z. Liu, Iman Salem Roqan
  • Carrier Dynamics
  • Efficiency Droop
  • InGaN
  • Light-Emitting Diode
  • Time-resolved Spectroscopy
Enhanced Performance of MoS2 Photodetectors by Inserting a ALD-Processed TiO2 Interlayer
Year: 2018
Authors: Yusin Pak, Woojin Park, Somak Mitra, Assa Aravindh Sasikalav Devi, Kalaivanan Loganathan, Kumaresan Yogeenth, Yonghum Kim, Byungjin Cho, Gun-Young Jung, Muhammad M. Hussain, Iman Salem Roqan
  • Atomic Layer Deposition
  • Interlayer
  • Molybdenum Disulfide
  • Photodetectors
  • Titanium Dioxide
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