Type of Document	Dissertation
Author	He, Jianqing
URN	etd-05042006-164534
Title	Finite difference time domain simulation of subpicosecond semiconductor optical devices
Degree	PhD
Department	Electrical Engineering
Advisory Committee	Advisor Name Title Elshabini-Riad, Aicha A. Committee Co-Chair Riad, Sedki Mohamed Committee Co-Chair Besieris, Ioannis M. Committee Member Lin, Tao Committee Member Saed, Mohammad A. Committee Member Safaai-Jazi, Ahmad Committee Member
Keywords	Semiconductor switches Mathematical models Finite differences Optoelectronic devices Mathematical models
Date of Defense	1993-11-05
Availability	restricted
Abstract An efficient numerical method to simulate a subpicosecond semiconductor optical switch is developed in this research. The problem under studying involves both electromagnetic wave propagation and semiconductor dynamic transport, which is a nonlinear phenomenon. Finite difference time domain (FDTD) technique is used to approximate the time dependent Maxwell's equations for full-wave analysis of the wave propagation. The dynamic transport is handled by solving the balance equations using the energy and momentum relaxation time approximation. Based on the structure of the device, a physical semi-analytical model is also developed for preliminary analysis. Simulation results in the device's subpicosecond responses including nonlinearity and overshoot. The validity of the method is verified by comparing the simulation with the published experimental results. The method can be extended to other devices as well.
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