Metalorganic Chemical Vapor Deposition Grown InAs/GaInSb Strained Layer Superlattices for Infrared Detection

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 25918
Amount: $59,992.00
Phase: Phase I
Program: SBIR
Awards Year: 1994
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
One Patriots Park, Bedford, MA, 01730
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Nasser H. Karam, Ph.d.
 (617) 275-6000
Business Contact
Phone: () -
Research Institution
We propose to design and fabricate a two-color detector using InAs/GaInSb strained-layer superlattices (SLS) operating in the 8 to 20 um wavelength region. In the proposed design, superlattices with different periods corresponding to two different wavelengths will be stacked with a thick common layer between them. Among the many advantages of these InAs/GaInSb SLS detectors are excellent uniformity, normal incidence detection, intrinsic absorption, small leakage current, reduced Auger recombination, and compatibility with III-V leakage current, reduced Auger recombination, and compatibility with III-V optotelectronic devices. The unique properties of InAs/GaInSb superlattices will permit both photoconductive and photovoltaic detectors to be constructed. In Phase I, metalorganic chemical vapor deposition (MOCVD) growth conditions for superlattices with different barrier and well thicknesses will be established. Single element photoconductive infrared detectors operating in the 8 to 10 um and 15 to 20 um wavelength regions will be fabricated from the best of these structures. Phase II will optimize barrier thickness, well thickness, and GaInSb composition for absorption at 8 to 20 um, produce and characterize detectors exhibiting this optimal structure, and then assemble these detectors into fully functional arrays.

* Information listed above is at the time of submission. *

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