Plasmonic Enhanced Type-II Superlattice Focal Plane Arrays

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$124,884.00
Award Year:
2013
Program:
SBIR
Phase:
Phase I
Contract:
NNX13CP18P
Agency Tracking Number:
125380
Solicitation Year:
2012
Solicitation Topic Code:
S1.03
Solicitation Number:
n/a
Small Business Information
SVT Associates
7620 Executive Drive, Eden Prairie, MN, 55344-3677
Hubzone Owned:
N
Minority Owned:
Y
Woman Owned:
N
Duns:
876868647
Principal Investigator:
Wentao Lu
Principle Investigator
(952) 934-2100
wlu@svta.com
Business Contact:
Leslie Price
Business Official
(952) 934-2100
price@svta.com
Research Institution:
Stub




Abstract
SVT Associates proposes an novel type II superlattice structure to extend the cutoff wavelength and CBIRD SL photo diode structure with unipolar barriers to suppress dark current of SL detectors grown on GaSb substrate. This InAs/GaSb superlattice material system is capable of infrared detection in MWIR/LWIR spectral range, depending on layer thickness of each superlattice period. The goal of this program is to develop high performance type II SL based FPA for 5-14 um detection. Photodetector 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 LWIR 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 type-II superlattice detectors should result in higher operating temperature, extended cutoff wavelength, and improved quantum efficiency, 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 passive-cooled high-performance LWIR FPAs with quantum efficiency larger than 60%.

* information listed above is at the time of submission.

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