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Intervalence Band THz Laser in p/p+ Ge Heterostructure

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
2002 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Zaubertek, Inc.
12565 Research Parkway Suite 300 Orlando, FL 32826-0328
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2002
Title: Intervalence Band THz Laser in p/p+ Ge Heterostructure
Agency / Branch: DOD / USAF
Contract: F49620-02-C-0025
Award Amount: $99,999.00


In this STTR phase I project, a new THz laser mechanism based on p/p+ periodically doped Ge heterostructures will be studied. The intent is to eliminate the optical phonon scattering required in traditional bulk p-Ge lasers, which causes overheating andlimits their duty and gain. A CW laser with 1-4 THz tunability and picosecond pulse capability is anticipated. The new mechanism is based on selective scattering of light and heavy holes on the periodic p+ layers, leading to light-hole accumulation andamplification of THz emission on direct light- to heavy-hole transitions. The average hole concentration will be increased by several orders, giving a proportional increase in gain. A candidate structure will be selected from results of Monte Carlosimulations of hole dynamics in crossed electric and magnetic fields for various delta-, square-, and sinusoidally-modulated doping profiles. A contract manufacturer will grow the structure. The doping profile will be verified by the electron beaminduced current technique, and far-infrared gain will be measured. A new laser with novel application opportunities in communications (space, air, ground), chemical sensing (upper atmosphere, bio/chem agents), and non-destructive evaluation.

Principal Investigator:

Steve Kleckley
Principal Investigator

Business Contact:

Janis Key
Business Manager
Small Business Information at Submission:

Zaubertek, Inc.
12565 Research Parkway, Suite 300 Orlando, FL 32826

EIN/Tax ID: 593373088
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of Central Florida
Department of Physics, 4000 Central Florida Blvd.
Orlando, FL 32826
Contact: Betsy L. Gray
Contact Phone: (407) 823-2836
RI Type: Nonprofit college or university