Accession Number:

ADA639304

Title:

Simulation Studies of Persistent Photoconductivity, Filamentary Conduction and Optical Pulse Positioning on the High Voltage Response of Semi-Insulating GaAs Photoconductive Switches

Descriptive Note:

Conference paper

Corporate Author:

AIR FORCE RESEARCH LAB KIRTLAND AFB NM

Report Date:

1999-06-01

Pagination or Media Count:

6.0

Abstract:

A self-consistent, two-dimensional, time-dependent, drift-diffusion model is developed to simulate the response of high power photoconductive switches. Effects of spatial inhomogeneities associated with the contact barrier potential are shown to foster filamenation. Results of the dark current match available experiments. Persistent photoconductivity is shown to arise at high bias even under conditions CE spatial uniformity. Filamentary currents require an inherent spatial inhomogeneity, and am more likely to occur for low optical excitation. Finally, it is shown that the switch response can be varied by changing the spatial position of the optical excitation pulse.

Subject Categories:

  • Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE