LECTURE SERIES – SCHOOL OF MATHEMATICS, PHYSICS AND TECHNOLOGY
Library, Auditorium, 2 p.m.
Phase coherent photorefractive effect in semiconductor quantum well and its application for optical coherence imaging
Dr. Amin Kabir
School of Mathematics, Physics and Technology
Semiconductor nanostructures have received steadily growing interests due to their fascinating applications in photonic devices. Studies of physical processes involving the ultrafast dynamics of quantum confined charge carriers led to improvements of novel ultrafast optical switches, quantum data storage and information devices. Based on the controlled carrier transfer, an all-optical phase coherent photorefractive (PCP) effect in ZnSe/ZnMgSe quantum well has been discovered using ultrashort light pulses in a four-wave-mixing (FWM) configuration. The high diffraction efficiency and the long electron grating lifetime of the PCP effect bear tremendous potential for optical data storage and real-time holographic imaging. PCP utilizes the coherence of excitons for time-gating which enables “single-shot” three-dimensional (3D) real-time optical coherence imaging thus bearing tremendous potential for monitoring dynamical processes in biological systems and for particle detection.
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