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Nanostructures for Dislocation Blocking in Infrare

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
83227
Program Year/Program:
2008 / STTR
Agency Tracking Number:
A074-006-0026
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
EPIR Technologies Inc
590 Territorial Drive, Suite B Bolingbrook, IL -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2008
Title: Nanostructures for Dislocation Blocking in Infrare
Agency / Branch: DOD / ARMY
Contract: W911NF-08-C-0069
Award Amount: $749,995.00
 

Abstract:

Current state of the art LWIR and VLWIR focal plane arrays are typically fabricated with HgCdTe epilayers grown on expensive and limited-size CdZnTe substrates. The transition to silicon-based substrates, which are much cheaper and available in large sizes, has been hindered by high dislocation densities in HgCdTe epilayers resulting from lattice mismatch-induced strain. We propose the novel approach of nanopatterning silicon-based substrates to exploit strain relaxation in 3-dimensions before growing high quality CdTe buffer layers and subsequent LWIR HgCdTe epilayers. The selective area epitaxy of CdTe at the nanoscale followed by lateral epitaxial overgrowth and then coalescence, as demonstrated in Phase I, will result in high quality CdTe layers. Strategies to improve the coalescence of CdTe on the nanopatterned substrates and resolve thermal mismatch strain by novel nanoscale geometries will be developed and implemented in the proposed Phase II program. LWIR HgCdTe will be grown on silicon-based nanopatterned substrates by molecular beam epitaxy and extensive material and interface characterizations will be performed to analyze the advantages of nanoscale patterning. Single element detectors and test arrays will be fabricated from the HgCdTe epilayers and characterized extensively for electrical and optical performance.

Principal Investigator:

Ramana Bommena
Engineer
6307710203
rbommena@epir.com

Business Contact:

Sivalingam Sivanantha
President
6307710201
ssivananthan@epir.com
Small Business Information at Submission:

EPIR TECHNOLOGIES, INC.
590 Territorial Drive, Suite B Bolingbrook, IL 60440

EIN/Tax ID: 364196918
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
UNIV. OF ILLINOIS AT CHIGACO
1737 West Polk Street (MC 672)
304 Administrative Office Bldg
Chicago, IL 60612
Contact: Luis R. Vargas
Contact Phone: (312) 996-2862
RI Type: Nonprofit college or university