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) : Li, Sheng S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257799.pdf


Report Date : 10 Nov 1992


Pagination or Media Count : 57


Abstract : Project Objectives: to develop ultra-low dark current and high detectivity planar metal grating coupled bound-to-miniband(BTM) 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 GaAs/AlGaAs, AlAs/AlGaAs, and InGaP/GaAs substrates, and InAlAs/InGaAs 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.


Descriptors :   *METALS , *ARRAYS , *INFRARED DETECTORS , *FOCAL PLANES , *GRATINGS(SPECTRA) , OPTICS , DETECTION , MATERIALS , ALUMINUM ARSENIDES , PHOTODETECTORS , INDIUM COMPOUNDS , COUPLINGS , NOISE , BARRIERS , ILLUMINATION , SUBSTRATES , GALLIUM ARSENIDES , ALUMINUM GALLIUM ARSENIDES , SUPERLATTICES


Subject Categories : Inorganic Chemistry
      Electrooptical and Optoelectronic Devices
      Infrared Detection and Detectors
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE