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640 x 512 Pixels Long-Wavelength Infrared (LWIR) Quantum-Dot Infrared Photodetector (QDIP) Imaging Focal Plane ArrayEpitaxially grown self-assembled. InAs-InGaAs-GaAs quantum dots (QDs) are exploited for the development of large-format long-wavelength infrared focal plane arrays (FPAs). The dot-in-a-well (DWELL) structures were experimentally shown to absorb both 45 degrees and normal incident light, therefore, a reflection grating structure was used to enhance the quantum efficiency. The devices exhibit peak responsivity out to 8.1 micrometers, with peak detectivity reaching approximately 1 X 10(exp 10) Jones at 77 K. The devices were fabricated into the first long-wavelength 640 x 512 pixel QD infrared photodetector imaging FPA, which has produced excellent infrared imagery with noise equivalent temperature difference of 40 mK at 60-K operating temperature.
Document ID
20080047097
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
Authors
Gunapala, Sarath D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bandara, Sumith V.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hill, Cory J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ting, David Z.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Liu, John K.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rafol, Sir B.
(Infravision Systems Altadena, CA, United States)
Blazejewski, Edward R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mumolo, Jason M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Keo, Sam A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Krishna, Sanjay
(New Mexico Univ. Albuquerque, NM, United States)
Chang, Y. -C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Shott, Craig A.
(FLIR Systems, Inc. Goleta, CA, United States)
Date Acquired
August 24, 2013
Publication Date
March 3, 2007
Publication Information
Publication: IEEE Journal of Quantum Electronics
Publisher: Institute of Electrical and Electronics Engineers
Volume: e 43
Issue: 3
ISSN: 0018-9197
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Other
Keywords
quantum dots (QDs)
focal plane array
infrared detector

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