Hot-Electron Nanobolometers Based on Disordered GaN Heterostructures

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX12CE53P
Agency Tracking Number: 114564
Amount: $124,986.00
Phase: Phase I
Program: SBIR
Awards Year: 2012
Solicitation Year: 2011
Solicitation Topic Code: S1.04
Solicitation Number: N/A
Small Business Information
4240 Ridge Lea, Amherst, NY, 14226-1080
DUNS: 029147928
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Darold Wobschall
 Principal Investigator
 (716) 837-8719
Business Contact
 Darold Wobschall
Title: Business Official
Phone: (716) 837-8719
Research Institution
The proposed research is to develop hot electron THz nanobolometers (nanoHEB) with unprecedented low electron heat capacity (~10-19 J/K) for use in advanced heterodyne receivers, operating from liquid nitrogen to room temperatures. The sensor is based on the effect of electron heating in highly disordered two-dimensional electron gas (2DEG) in GaN heterostructures. Several methods for 2DEG nanoscale patterning, including the split-gate design, are proposed to fabricate the antenna coupled nanodevices. Because of the small electron heat capacity of the sensor, the proposed mixer requires the power of local oscillator (LO) at the level of 1-10¿W. With these sensors a single chain of THz multipliers may be used to provide LOs to entire array of sensors in imaging applications of heterodyne detectors. The picosecond hot electron cooling allows wide bandwidth (to 30 MHz). The project goals are to develop a technological route for fabrication of 2DEG AlInN/GaN microdevices, demonstrate effects of electron heating by 2?4 THz radiation in AlInN/GaN nanodevices, determine basic transport and kinetic parameters, and develop a preliminary prototype nanobolometer for 2 -4 THz range.

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

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