The Growth of InAs/GaSb Type II Superlattices on Si Substrates for Infrared FPAs

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$92,063.00
Award Year:
2004
Program:
SBIR
Phase:
Phase I
Contract:
HQ0006-04-C-7037
Award Id:
69600
Agency Tracking Number:
B041-038-0138
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1801 Maple Avenue, Evanston, IL, 60201
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
129503988
Principal Investigator:
Vahid Yazdanpanah
Technical Director
(847) 256-7648
yazdan_v@yahoo.com
Business Contact:
Manijeh Razeghi
President
(847) 256-7648
razeghi@ece.northwestern.edu
Research Institution:
n/a
Abstract
High performance infrared detectors in the mid and long wavelength infrared (MWIR and LWIR) spectral bands are highly needed in a number of missile defense missions. Type II InAs/GaSb superlattices represent the most promising material system capable of delivering a more affordable and producible focal plane array (FPA) technology than the current technology, while at the same time exhibiting similar or better performance. Two of the major challenges in the realization of FPA in this system pertain to the unintentionally doped p-type GaSb substrate used in the growth of type II superlattices: its strong infrared absorption and its thermal mismatch with the silicon ROIC that leads to cracking and thus limits the FPA size. It is therefore proposed here to study the feasibility of growing type II InAs/GaSb superlattices on silicon substrates in spite of a lattice mismatch of ~11 %. The design and optimization of an appropriate buffer layer technique will be an essential part of the proposed work.

* information listed above is at the time of submission.

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