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Minority Carrier Lifetime Measurements in Strained Layer Superlattices

Award Information

Department of Defense
Defense Advanced Research Projects Agency
Award ID:
Program Year/Program:
2009 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Amethyst Research, Inc.
123 Case Circle Ardmore, OK 73401-0643
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2009
Title: Minority Carrier Lifetime Measurements in Strained Layer Superlattices
Agency / Branch: DOD / DARPA
Contract: W911NF-09-C-0120
Award Amount: $99,979.00


Type II strained layer superlattice (SLS) p-n diode arrays fabricated on domestic-source GaSb substrates are a promising route to meet the critical need within DoD for large area, large format array infrared detectors. However, current SLS material quality is limiting detector performance. A quantitative, cost effective and trusted evaluation technique for measuring the SLS minority carrier lifetime is critical to establishing a comprehensive development program for the SLS system. In Phase I we will develop an automated, variable temperature photoconductance decay (PCD) lifetime measurement system capable of measuring lifetimes in the range of 1 ns (existing SLS materials quality) up to 25 ms (anticipated long-term SLS quality). The system will also permit synergistic use of equipment components to allow various other techniques to be incorporated on a common platform, such as current transient spectroscopy and photo induced current transient spectroscopy. The appropriate combination with PCD lifetime measurements will provide an unprecedented, coordinated technique for materials evaluation. The program brings together teams from Amethyst Research, Texas State University and IntelliEPI. In Phase II a system will be built and fully evaluated to establish a sustainable product platform. The final product will comprise an Integrated Narrow-Bandgap Lifetime Assessment Platform (INLAP).

Principal Investigator:

Daniel Johnstone
Senior Research Scientist

Business Contact:

Sallie Reddy
Small Business Information at Submission:

Amethyst Research Incorporated
1405 4th Ave NW, Suite 345 Ardmore, OK 73401

EIN/Tax ID: 562472936
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
Texas State University
RF Mitte Building, 3206
Texas State University
San Marcos, TX 78666
Contact: Thomas H. Myers
Contact Phone: (512) 245-6711
RI Type: Nonprofit college or university