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

Abstract

Since the beginning of this DARPA sponsored IR detector project, we have made significant progress toward achieving the original project goals. We have designed and fabricated two new types of IR detectors using step- bound-to- miniband (SBTM) and bound-to-miniband (BTM) transition multiple-quantum-well (MQW)/superlattice (SL) barrier structures grown by MBE technique. The results showed that the dark current for the SBTM IR detector measured at 77 K was more than one order of magnitude lower than the conventional QWIP's (using bound-to- continuum band transition) reported in the literature. To optimize the grating couplers for the top and back illumination, we have designed and fabricated 10 new photomasks with various grating patterns and different grating periodicities to be used for the proposed study of light coupling efficiency versus grating periodicity in the large area MQW/SL IR detectors.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1991
Accession Number
ADA242821

Entities

People

  • Shen S. Li

Organizations

  • University of Florida

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Analyzers
  • Band Structures
  • Coefficients
  • Detection
  • Detectors
  • Electronics Laboratories
  • Energy Bands
  • Energy Levels
  • Focal Planes
  • Ground State
  • Infrared Detectors
  • Long Wavelengths
  • Metal-Semiconductor Junctions
  • Quantum Wells
  • Thermionic Emission

Fields of Study

  • Materials science
  • Physics

Readers

  • Image Processing and Computer Vision.
  • Nanofabrication and Microfabrication.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Quantum Computing