Optimization of Strain-Balanced Heterostructures for High Power 4-5 Micron Quantum Cascade Lasers

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911NF-04-C-0069
Agency Tracking Number: A045-012-0025
Amount: $99,367.00
Phase: Phase I
Program: STTR
Awards Year: 2004
Solicitation Year: 2004
Solicitation Topic Code: A04-T012
Solicitation Number: N/A
Small Business Information
1801 Maple Avenue, Evanston, IL, 60201
DUNS: 129503988
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Steven Slivken
 Technical Director
 (847) 491-7208
Business Contact
 Manijeh Razeghi
Title: President
Phone: (847) 491-7208
Email: razeghi@ece.northwestern.edu
Research Institution
 Northwestern University
 Charlotte Newman
 633 Clark Street, Room 2-502
Evanston, IL, 60208
 (847) 491-1967
 Nonprofit college or university
In order to extract the full potential of quantum cascade laser technology, a heterostructure with a large conduction band offset is required in order to minimize thermal leakage associated with high average power operating conditions. Strain-balanced heterostructures, based on GaInAs/ AlInAs/ InP, exist which are predicted to allow efficient laser operation in the 3-5 micron wavelength region. Due to a large mismatch relative to InP, strict control over layer composition and thickness is required in order to accurately reproduce ideal quantum well heterostructures. In this project, the main effort will be to optimize quantum well shape using strain-balanced heterostructures. In addition, experimental data will be gathered in order to update band structure parameters, which will allow for more accurate laser design. By the end of the project, a laser source with >20 mW continuous wave power in the 3-5 micron wavelength will be demonstrated.

* Information listed above is at the time of submission. *

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