Accession Number : ADA254697

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 progress rept. no. 4, 1 May-31 Jul 92,

Corporate Author : FLORIDA UNIV GAINESVILLE DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Li, Sheng S.

Report Date : 07 AUG 1992

Pagination or Media Count : 48

Abstract : Project objectives include the following: (1) To develop low dark current and high detectivity planar metal grating coupled bound-to-miniband III-V multiquantum well infrared photodetectors (QWIPs) for 8 to 12 microns FPA and IR sensor applications. (2) To develop other new types of III-V multicolor QWIPs with broad and multicolor infrared spectral response (5 to 18 microns). (3) To conduct theoretical and experimental studies of the planar metal grating-coupled structures for normal incident illumination on the QWIPs. Different metal grating coupler structures using 1-D line-grating and 2-D cross-grating for the QWIPs will be studied in order to achieve high coupling efficiency under normal front- and back- illuminations. and (4) To perform theoretical and experimental studies of dark current, photocurrent, optical absorption, spectral responsivity, noise, and detectivity in different types of QWIPs.

Descriptors :   *PHOTODETECTORS, *INFRARED DETECTORS, ABSORPTION, COUPLERS, COUPLING(INTERACTION), EFFICIENCY, ILLUMINATION, METALS, NOISE, RESPONSE, STRUCTURES, GRATINGS(SPECTRA), QUANTUM ELECTRONICS, SUPERLATTICES, FOCAL PLANES, GALLIUM ARSENIDES, ALUMINUM GALLIUM ARSENIDES.

Subject Categories : Optical Detection and Detectors
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE