Accession Number:

ADA257799

Title:

Development of Ultra-Low Noise, High Sensitivity Planar Metal Grating Coupled AlGaAs/GaAs Multiquantum Well IR Detectors for Focal Plane Array Staring IR Sensor Systems

Descriptive Note:

Quarterly rept. no. 5, 1 Aug-31 Oct 1992

Corporate Author:

FLORIDA UNIV GAINESVILLE DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1992-11-10

Pagination or Media Count:

57.0

Abstract:

Project Objectives to develop ultra-low dark current and high detectivity planar metal grating coupled bound-to-minibandBTM III-V quantum well infrared photodetectors, QWIPs for 8 to 12 microns focal plane array FPA staring IR sensor system to develop novel type-I and type-II III-V QWIPs with multicolor, broad and narrow band spectral response in the 8 to 14 microns wavelength range. The material systems to be studied include GaAsAlGaAs, AlAsAlGaAs, and InGaPGaAs substrates, and InAlAsInGaAs grown on Inp substrate to conduct theoretical and experimental studies of the planar metal grating-coupled structures for normal incident illumination on the QWIPs. Different metal grating coupling structures using 1-D line and 2-D square metal gratings for the QWIPs will be studied in order to achieve high coupling efficiency under normal front- and back illuminations and to perform theoretical and experimental studies of dark-current, photocurrent, optical absorption, spectral responsivity, noise, and detectivity on different types of QWIPs developed under this program.

Subject Categories:

  • Inorganic Chemistry
  • Electrooptical and Optoelectronic Devices
  • Infrared Detection and Detectors
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE