Uncooled High-Performance InAsSb Focal Plane Arrays

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CE77P
Agency Tracking Number: 105749
Amount: $99,688.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: S1.04
Solicitation Number: N/A
Small Business Information
7620 Executive Drive, Eden Prairie, MN, 55344-3677
DUNS: 876868647
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Yiqiao Chen
 Principal Investigator
 (952) 934-2100
 chen@svta.com
Business Contact
 Leslie Price
Title: Contract Manager
Phone: (952) 934-2100
Email: price@svta.com
Research Institution
 Stub
Abstract
SVT Associates proposes an innovative digital alloy technique to extend the cutoff wavelength of InAsSb beyond 5 um, a wider band gap InAlAsSb layer inserted into depletion region to suppress dark current, and atomic layer deposition technique to coat radiation-hard material AlN on InAsSb detectors grown on GaSb substrate. This digital alloy InAsSb material system is capable of infrared detection between 0.4-5 um, depending on layer thickness of the period of each digital ultra thin superlattice. The goal of this program is to develop InAsSb-based FPA for 0.4-5 um detection at room temperature. Photo detector arrays using this material are of great interest to the NASA for various applications including, in particular, imaging and optical detection, and object discrimination when tracking targets in space or performing astronomical observations. These MWIR photo detectors can also find application to infrared-based chemical identification systems and terrestrial mapping. Applying the dark current suppression and cutoff wavelength extension process to the InAsSb-based detectors should result in higher operating temperature, extended cutoff wavelength, and radiation-hard devices, all important factors that should significantly enhance FPA operation. We intend to characterize the positive effects of proposed techniques in Phase I. In Phase II we will refine the techniques to realize high-performance MWIR FPAs operating at ambient temperatures.

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

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