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High-Detectivity Very-Long-Wavelength Strain-Compensated Type II Superlattice…

Award Information

Department of Energy
Award ID:
Program Year/Program:
2009 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
SVT Associates, Inc.
7620 executive drive eden prairie, MN 55344
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2009
Title: High-Detectivity Very-Long-Wavelength Strain-Compensated Type II Superlattice Infrared Photo Detectors
Agency: DOE
Contract: DE-FG02-09ER85467
Award Amount: $99,826.00


Very-long-wavelength infrared (VLWIR) photo detectors are needed for infrared-based chemical identification and terrestrial mapping applications associated with the detection of weapons of mass destruction. This project will develop a material system for a high-performance type-II VLWIR photo detector fabricated on a GaSb substrate. The approach will involve (1) a strain-compensated type II superlattice structure, (2) a dark-current suppression technique for InAs/GaSb/AlGaSb superlattice PIN diodes in the depletion region, and (3) an atomic-hydrogen-enhanced growth and surface preparation technique. Phase I will characterize the positive affects of strain-compensation and dark current suppression process in type II PIN structures. Phase II will refine the techniques to realize type II superlattice detectors in the 300-1000 cm-1 region at liquid nitrogen temperatures. Commercial Applications and other Benefits as described by the awardee The technology should result in higher optical absorption, higher operating temperature, higher material purity, and very low dislocation density, factors that should significantly enhance device operation in the 300-1000 cm-1 region. Photo detector arrays using this material would be of great interest to the DOE for various applications, including, in particular, imaging and remote sensing.

Principal Investigator:

Yiqiao Chen

Business Contact:

Leslie Price
Small Business Information at Submission:

Svt Associates, Inc.
7620 Executive Drive Eden Prairie, MN 55344

EIN/Tax ID: 411764876
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No