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Single Photon Sensitive HgCdTe Avalanche Photodiode Detector (APD)

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
83993
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
066861
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Voxtel Inc.
15985 NW Schendel Avenue Suite 200 Beaverton, OR 97006-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2008
Title: Single Photon Sensitive HgCdTe Avalanche Photodiode Detector (APD)
Agency: NASA
Contract: NNX08CA29C
Award Amount: $599,984.00
 

Abstract:

Leveraging Phase I SBIR successes, in Phase II, a single photon sensitive LIDAR receiver will be fabricated and delivered to NASA. In Phase I, high-gain, electron-initiated avalanche photodiodes (e-APDS) were designed, manufactured, and characterized over a range of temperatures. The e-APDs, sensitive from 1064 nm to 4300 nm, were fabricated in single-layer p-type HgCdTe films grown using liquid phase epitaxy on IR-transparent CdZnTe substrates. Variable-diameter e-APDs, large-area 250-micron diameter e-APDs, and segmented 1-mm x 1-mm e-APDS - each with sixteen 250-micron x 250-micron pixel elements - were mounted to ceramic submounts, tested, and characterized. Under receiver bias, the e-APDs exhibited exponentially increasing gain that exceeded 1250. The devices showed exponentially increasing gain as a function of cutoff wavelength, and with decreased temperature - in agreement with our models for HgCdTe e-APDs. In Phase II, we will optimize HgCdTe films for 1.5ýý3.6 micron response and fabricate 250-micron diameter e-APD elements, designed for operation with gains exceeding 1250, without excess noise. These e-APDs, when integrated with custom-designed <100 e- rms noise transimpedance amplifiers and optimized to match the e-APDs' capacitance, will realize single photon sensitive LIDAR receivers for NASA LIDAR applications.

Principal Investigator:

Andrew Huntington
Principal Investigator
9712235646
andrew@voxtel-inc.com

Business Contact:

George M. Williams
Business Official
9712235646
georgew@voxtel-inc.com
Small Business Information at Submission:

Voxtel, Inc.
12725 SW Millikan Way, Suite 230 Beaverton, OR 97005

EIN/Tax ID: 931285205
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No