Two color, Bias Selectable, HgCdTe Airborne Multispectrum Sensor Arrays

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 26537
Amount: $69,304.00
Phase: Phase I
Program: SBIR
Awards Year: 1994
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
One Patriots Park, Bedford, MA, 01730
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Nasser H. Karam, Ph.d.
 (617) 275-6000
Business Contact
Phone: () -
Research Institution
N/A
Abstract
Spire proposes to design a multispectral infrared camera basaed on a two-color bias-selectable focal plane array fabricated in HgCdTe prepared by MOCVD. The proposed detector is a two terminal, HgCdTe, n-p-n heterostructure which can be thought of as two back-to-back diodes. Through proper selection of the materials composition and application of an appropriate bias, the device can be made sensitive to either 3-5 or 8-12 micron radiation. With good junction characteristics, background limited performance (BLIP) should be achievable in both bands. In addition, the device only requires two terminals such that a mosaic of detectors could be hybridized with a silicon signal processor using existing bump technology. In Phase I, Spire and its subcontractor Santa Barbara Focal Plane will design a two-color IR focal plane array camera and experimentally demonstrate the proposed two-color HgCdTe IR detector in MOCVD materials. Spire has successfully fabricated MOCVD two-color devices with cut-off wavelengths at 4.8 and 9.0 microns on bulk CdZnTe. In Phase II, we will apply an opimized device structure to MOCVD grown HgCdTe/CdZnTe/GaAs/Si and build a prototype 256 x 256 two-color focal plane array. The array will be integrated with an IR camera and deomonstrated in a portable brass-board system.

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

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