Assistant Professor in Physical Science and Engineering Division
Prof. Iman Roqan has experience in fundamental studies of wide band gap semiconductors, mainly III-nitrides and Oxides; the material system that enabled high efficiency LEDs. Her main specialty is investigating the role of defects and material structure by optical spectroscopy. Her group focus on investigating the optical and structural characterizations of materials with different structures: nanorods, quantum well and quantum dots materials.
They could identify the carrier mechanism such as carrier confinement behavior, quantum stark effect, carrier density and carrier injection. Moreover, they could also identify the effect of the width of the quantum well/barrier, the effect of the nanorod structure, the bandgap structure, the polarization effect, the interaction of defect bands in the spectra and the identification of their source by time-resolved spectroscopy (TRS), photoluminescence (PL) and photoluminescence excitation (PLE). Second and third Harmonic Generator and OPO facilities add additional laser tunability and allow us to do PLE and selective TRS measurements simultaneously.
Prof. Iman Roqan is an assistant professor in the Physical Sciences and Engineering Division at KAUST. She obtained her M.Sc. in optoelectronic and photonic devices from St. Andrews and Heriot-Watt Universities, United Kingdom. Her Ph.D. was obtained from the University of Strathclyde in semiconductor and spectroscopy. She also has established several collaborative projects with international universities, Saudi institutes and industrial companies.
Enhanced solar-blind deep UV photodetectors based on solution-processed p-MnO quantum dots and n-GaN p–n junction-structure
H Alamoudi, B Xin, S Mitra, MN Hedhili, S Venkatesh, D Almalawi, ...
Applied Physics Letters 120 (12) (2022)
Micropump Fluidic Strategy for Fabricating Perovskite Microwire Array-Based Devices Embedded in Semiconductor Platform
B Xin, Y Pak, M Shi, S Mitra, X Zheng, OM Bakr, IS Roqan
Cell Reports Physical Science 2 (1) (2021)
Manipulation of hot carrier cooling dynamics in two-dimensional Dion–Jacobson hybrid perovskites via Rashba band splitting
J Yin, R Naphade, P Maity, L Gutiérrez-Arzaluz, D Almalawi, IS Roqan, ...
Nature communications 12 (1), 3995 (2021)
Identifying Carrier Behavior in Ultrathin Indirect‐Bandgap CsPbX3 Nanocrystal Films for Use in UV/Visible‐Blind High‐Energy Detectors
B Xin, N Alaal, S Mitra, A Subahi, Y Pak, D Almalawi, N Alwadai, ...
Small 16 (43), 2004513 (2020)
Unambiguously enhanced ultraviolet luminescence of AlGaN wavy quantum well structures grown on large misoriented sapphire substrate
H Sun, S Mitra, RC Subedi, Y Zhang, W Guo, J Ye, MK Shakfa, TK Ng, ...
Advanced Functional Materials 29 (48), 1905445 (2019)
High-performance solar-blind flexible deep-UV photodetectors based on quantum dots synthesized by femtosecond-laser ablation
S Mitra, A Aravindh, G Das, Y Pak, I Ajia, K Loganathan, E Di Fabrizio, ...
Nano Energy 48, 551-559 (2018)
A photodetector based on p-Si/n-ZnO nanotube heterojunctions with high ultraviolet responsivity
TH Flemban, MA Haque, I Ajia, N Alwadai, S Mitra, T Wu, IS Roqan
ACS applied materials & interfaces 9 (42), 37120-37127 (2017)
High-performance ultraviolet-to-infrared broadband perovskite photodetectors achieved via inter-/intraband transitions
N Alwadai, MA Haque, S Mitra, T Flemban, Y Pak, T Wu, I Roqan
ACS applied materials & interfaces 9 (43), 37832-37838 (2017)
Identification of the prime optical center in GaN: Eu 3+
IS Roqan, KP O'Donnell, RW Martin, PR Edwards, SF Song, A Vantomme, ...
Physical Review B 81 (8), 085209 (2010)