High Performance Dual Band Photodetector Arrays for MWIR/LWIR Imaging

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNL07AA93P
Agency Tracking Number: 067317
Amount: $99,484.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: S6.01
Solicitation Number: N/A
Small Business Information
7620 Executive Dr, Eden Prairie, MN, 55344-3677
DUNS: 87686847
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: Business Manager
Phone: (952) 934-2100
Email: price@svta.com
Research Institution
N/A
Abstract
Hyperspectral imaging arrays offer far more data and the ability to discriminate objects being observed. Continued difficulties with applying HgCdTe materials, especially for LWIR, present an opportunity for the development of alternate materials. One such candidate for MWIR/LWIR photodetectors are short period Type-II superlattices based on InAs/GaInSb. This material system has the ability to tune the cutoff wavelengths during device fabrication and yet be amenable to the creation of multi-spectral serially-positioned pixels. One of the issues this Phase I program will address is the intermixing of Arsenic and Antimony at the superlattice interfaces, which can hamper LWIR operation. Improved superlattice growth will be achieved through the application of newly developed MBE apparatus. At a second level, device performance will be enhanced by novel passivation of the pixel sidewalls. The Type-II superlattices with then be applied to the creation of dual-wavelength photodetectors for MWIR/LWIR imaging.

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

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