Project Title:

"Development Of A Unique Laboratory Standard Indium Gallium Arsenide

08.04-1188
Project Title:"Development Of A Unique Laboratory Standard Indium Gallium Arsenide
Detector For The 0.5-1.7 Micron Spectral Range"
Company:EPITAXX, Inc.
Princeton, NJ 08540
Principal Investigator:Olsen, Gregory H.

Abstract:

Spectral measurements over the visible/near-infrared 0.5.1-7 micron range cannot
be done at present with a single detector.  Two separate detectors (silicon for 0.5-1.1
microns and germanium for 1.0-1.7 microns) must presently be used in order to cover
the entire spectral range.  This complicates measurement procedures and adds cost
and extra components to the system.  We propose to develop a large-area indium gallium
arsenide (InGaAs) detector which will have high quantum efficiency over the 0.5-1.7
micron spectral range and allow a single detector to be used in place of both silicon
silicon and germanium.  No such detector exists at this time.  These InGaAs detectors
would have high uniformity and would be well suited as calibration standards for
the 0.5-1.7 micron spectral region.  Internal quantum efficiencies should be near
100% over much of this range.  The hydride vapor phase epitaxy (VPE) texhnique will
be used to synthesize layers of InGaAs and InP from which these detectors will be
made.  The InP thickness will be varied to determine its effect on quantum efficienty.
 Detailed radiometric calibration methods will be caried out at the Optical Sciences
Center at the University of Arizona.