Intervalence Band THz Laser in p/p+ Ge Heterostructure

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,999.00
Award Year:
2002
Program:
STTR
Phase:
Phase I
Contract:
F49620-02-C-0025
Agency Tracking Number:
F013-0104
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Zaubertek, Inc.
12565 Research Parkway, Suite 300, Orlando, FL, 32826
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
010040553
Principal Investigator:
Steve Kleckley
Principal Investigator
(407) 230-5704
zaubertk@concentric.net
Business Contact:
Janis Key
Business Manager
(407) 230-5704
zaubertk@concentric.net
Research Institution:
University of Central Florida
Betsy L Gray
Department of Physics, 4000 Central Florida Blvd.
Orlando, FL, 32826
(407) 823-2836
Nonprofit college or university
Abstract
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.

* information listed above is at the time of submission.

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