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8-9 and 14-15 Micron Two-Color 640x486 GaAs/AlGaAs Quantum Well Infrared Photodetector (QWIP) Focal Plane Array CameraAn optimized long-wavelength two-color Quantum Well Infrared Photodetector (QWIP) device structure has been designed. This device structure was grown on a three inch semi-insulating GaAs substrate by molecular beam epitaxy (MBE). This wafer was processed into several 640x486 format monolithically integrated 8-9 and 14-15 micron two color (or dual wavelength) QWIP focal plane arrays (FPAs). These FPAs were then hybridized to 640x486 silicon CMOS readout multiplexers. A thinned (i.e., substrate removed) FPA hybrid was integrated into a liquid helium cooled dewar to perform electrical and optical characterization and to demonstrate simultaneous two-color imagery. The 8-9 micron detectors in the FPA have shown background limited performance (BLIP) at 70 K operating temperature, at 300 K background with f/2 cold stop. The 14-15 micron detectors of the FPA have reached BLIP at 40 K operating temperature at the same background conditions. In this presentation we discuss the performance of this long-wavelength dualband QWIP FPA in quantum efficiency, detectivity, noise equivalent temperature difference (NEAT), uniformity, and operability.
Document ID
20000073229
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other
Authors
Gunapala, S. D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Bandara, S. V.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Singh, A.
(Air Force Research Lab. Kirkland AFB, NM United States)
Liu, J. K.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Rafol, S. B.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Luong, E. M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Mumolo, J. M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Tran, N. Q.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Vincent, J. D.
(Raytheon Co. Goleta, CA United States)
Shott, C. A.
(Raytheon Co. Goleta, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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