Project Title:

Room-Temperature Resonant Cavity Enhanced Tunable

Sensors Unlimited, Inc.
3490 US Route 1, Building 8
Princeton, NJ 08540

93-1-08.21-0610

Room-Temperature Resonant Cavity Enhanced Tunable
GaInAsSb/AlGaAsSb Photodetectors Grown by MO-MBE for 2 to 5 um.

Abstract:

We propose to design and demonstrate a unique photodetector
structure for the mid-infrared 2-5 um spectrum. The innovation
consists of combining an optical resonant cavity heterojunction
phototransistor and negative differential switch into a single
device using multi-quantum-well epitaxial layers. In Phase I, we
will investigate the growth of GaInAsSb and AlGaAsSb alloys via
metal organic molecular beam epitaxy ( "MO-MBE" ), and
characterize thin quantum well layers for crystal defects and
band discontinuities. In Phase II, we will construct and optimize
working devices and utilize these devices in gas sensing
instruments. Prof. Jian Zhao (Rutgers University) and Dr. Glen
Cullen (SRI David Sarnoff Research Center) will consult on this
project.

A high performance, high yield, photodetector which would
significantly increase the sensitivity of gas sensing
instruments. 

photodetector, multi-quantum-well, resonant cavity