Publications

Beyond Perovskites: Quantum Luminescence from Bulk Cs4PbBr6 Single Crystals

Year: 2017

Authors: Michele De Bastiani, Ibrahim Dursun, Buthainah Alshankiti, Xiao-He Miao, Jun Yin, Yengel Emre, Erkki Alarousu , Bekir Turedi, Yuhai Zhang, Jawaher Almutlaq, Makhsud Saidaminov, Somak Mitra, Iman Salem Roqan, Jean-Luc Bredas, Mohammed Omar, Osman Bakr

Perovskite

High-Performance Ultraviolet-to-Infrared Broadband Perovskite Photodetectors Achieved via Inter-/Intraband Transitionsmarcelo

Year: 2017

Authors: Norah Alwadai, Md. Azimul Haque, Somak Mitra, Tahani Hassan Flemban, Yusin Pak, Tom Wu, Iman Salem Roqan

Perovskite
ZnO
Metal Substrate
Intaband Absorption
Infared Detection

Significant internal quantum efficiency enhancement of GaN/AlGaN multiple quantum wells emitting at ~350 nm via step quantum well structure design

Year: 2017

Authors: Feng Wu, Idris A. Ajia, Haiding Sun, Somak Mitra, Daliang Zhang, Jiangnan Dai, Changging Chen, Zhe Chuan Feng, Iman Salem Roqan, Xiaohang Li

GaN/AlGaN MQWs
Internal Quantum Efficiency
Photoluminescence
Wave-Function Overlap

Photoinduced entropy of InGaN/GaN p-i-n double-heterostructure nanowires

Year: 2017

Authors: Nasir Alfaraj, Somak Mitra, Feng Wu, Idris A. Ajia, Bilaj Janjua, Aditya Prabaswara, Renad Aljefri, Haiding Sun, Tien Khee Ng, Boon S. Ooi, Iman Salem Roqan, Xiaoha Li

InGaN
Nanowires

Surface Passivation of III-Nitride Nanowires for Enhanced Photoelectrochemical Water-Splitting

Year: 2017

Authors: Purushothaman Varadhan, Davide Priante, Hui-Chun Fu, Jose Ramon Duran Retamal, Chao Zhao, Mohamed Ebaid, Tien Khee Ng, Idris A. Ajia, Somak Mitra, Iman Salem Roqan, Boon S. Ooi, Jr-Hau He

III-Nitrides
Nanowires
Photoelectrochemical Water-Splitting
Solar Fuel
Surface Passivation

Double Charged Surface Layers in Lead Halide Perovskite Crystals

Year: 2017

Authors: Mohammed Omar, Sarmah Smritakshi, Burlakov Victor, Yengel Emre, Murali Banavoth, Erkki Alarousu , Chen Yang , Ahmed El-Zohry, Alias Mohd, Ayan Zhumekenov, Makhsud Saidaminov, Cho Namchul, Nimer Wehbe, Somak Mitra, Idris A. Ajia, Dey Sukumar, Mansour Ahmed E.

Lead halide Peroviskite Crystals

Nature of low dimensional structural modulations and relative phase stability in RexMo(W)1-xS2 transition metal dichalcogenide alloys

Year: 2017

Authors: Rajib Sahu, Usha Bhat, Nitin M. Batra, Horta Sharona, Badri Vishal, Sumanta Sarkar, Assa Aravindh Sasikalav Devi, Sebastien C. Peter, Iman Salem Roqan, Pedro Costa, Ranjan Datta

Dichalcogenidealloys

Epitaxially-grown Gallium Nitride on Gallium Oxide substrate for photon pair generation in visible and telecomm wavelengths

Year: 2016

Authors: K. M. Awan, K. Dolgaleva, M.M. Muhammed, Iman Salem Roqan

Nanolinear optics
Integrated photonic circuit
Four-Wave Mixing
All-optical Wavelength Conversion
Photon pair Generation
GaN epitaxial growth

Droop-Free, Reliable, and High-Power InGaN/GaN Nanowire Light-Emitting Diodes for Monolithic Metal-Optoelectronics

Year: 2016

Authors: Chao Zhao, Tien Khee Ng, Rami T. ElAfandy, Aditya Prabaswara, Giuseppe Bernardo Consiglio, Idris A. Ajia, C. J. Humphreys & I. S. Roqan, Bilal Janjua, Chao Shen, Jessica Eid, Ahmed Y. Alyamani, Munir M. Eldesouki, Boon S. Ooi

Efficiency Droop
Light emitting diodes
Molecular beam epitaxy
Quantum-disks-in-nanowire

A close examination of the structure and dynamics of HC(NH2)2PbI3 by MD simulations and group theory

Year: 2016

Authors: M. A. Carignano, Y. Saeed, Assa Aravindh Sasikalav Devi, C. J. Humphreys & I. S. Roqan, Jacky Even, C. Katan

Perovskite

High-quality III-nitride films on conductive, transparent (201)- oriented β-Ga2O3 using a GaN buffer layer

Year: 2016

Authors: Mufasila Mumthaz Muhammed, M. A. Roldan, Y. Yamashita, S.-L. Sahonta, Idris A. Ajia, K. Lizuka, A. Kuramata, C. J. Humphreys & I. S. Roqan