High Performance Dual Band Photodetector Arrays for MWIR/LWIR Imaging

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,484.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
NNL07AA93P
Agency Tracking Number:
067317
Solicitation Year:
2006
Solicitation Topic Code:
S6.01
Solicitation Number:
n/a
Small Business Information
SVT Assoc
7620 Executive Dr, Eden Prairie, MN, 55344-3677
Hubzone Owned:
N
Socially and Economically Disadvantaged:
Y
Woman Owned:
N
Duns:
87686847
Principal Investigator:
Yiqiao Chen
Principal Investigator
(952) 934-2100
chen@svta.com
Business Contact:
Leslie Price
Business Manager
(952) 934-2100
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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