Efficient electromagnetic analysis of two-dimensional finite quasi-random gratings for quantum well infrared photodetectors

Vikram Jandhyala, Deepak Sengupta, Balasubramaniam Shanker, Eric Michielssen, Milton Feng, Greg Stillman

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, a recently developed full-wave electromagnetic analysis technique is applied to the simulation of two-dimensional finite quasi-random gratings for quantum well infrared photodetectors. This steepest descent fast multipole method is a mathematically rigorous technique that permits the rapid and accurate solution of the electric field integral equation governing scattering from a quasi-planar structure. In the present application, it enables the efficient and accurate simulation of scattering by finite two-dimensional grating structures interfacing with GaAs. Grating absorption is predicted by evaluating the scattered optical electric field component at the device layer along the growth direction. Numerical examples illustrating the functional dependence of the absorption on grating parameters and wavelength are discussed. The simulation approach presented here should prove to be a useful tool for the a priori design of novel aperiodic, quasi-random and rough surface two-dimensional gratings for infrared imaging applications.

Original languageEnglish (US)
Pages (from-to)3360-3363
Number of pages4
JournalJournal of Applied Physics
Volume83
Issue number6
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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