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
Abstract
During this reporting period (11-01-91 to 1-31-92), we have continued the study of the performance characteristics of the metal grating coupled bound-to-miniband (BTM) and step-bound-to-miniband (SBTM) transition multiquantum well(MQW)/superlattice (SL) barrier infrared (IR) detectors formed on the GaAs and InP substrates for 8-12 micrometer focal plane arrays and image sensor applications. Specific tasks performed included: (1) designed and grown several (BTM) GaAs- and (SBTM) InGaAs-based QWIP (quantum well infrared photodetector) structures by MBE technique, (2) fabricated the metal grating couplers on the QWIP's described in (1) with different granting periodicities (1.1,3.2,5,7.2, and 10 micrometers) and patterns (line and cross gratings), (3) performed theoretical and experimental study of the light coupling quantum efficiency vs. grating periodicities for the QWIP's, and (4) performed theoretical and experimental study of the dark current vs. temperature for the GaAs QWIP's. Detailed results are discussed in Section III.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1992
- Accession Number
- ADA246122
Entities
People
- Shengsan Li
Organizations
- University of Florida