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High Operating Temperature Midwave Quantum Dot Barrier Infrared Detector (QD-BIRD)The nBn or XBn barrier infrared detector has the advantage of reduced dark current resulting from suppressed Shockley-Read-Hall (SRH) recombination and surface leakage. High performance detectors and focal plane arrays (FPAs) based on InAsSb absorber lattice matched to GaSb substrate, with a matching AlAsSb unipolar electron barrier, have been demonstrated. The band gap of lattice-matched InAsSb yields a detector cutoff wavelength of approximately 4.2 ??m when operating at ~150K. We report results on extending the cutoff wavelength of midwave barrier infrared detectors by incorporating self-assembled InSb quantum dots into the active area of the detector. Using this approach, we were able to extend the detector cutoff wavelength to ~6 ?m, allowing the coverage of the full midwave infrared (MWIR) transmission window. The quantum dot barrier infrared detector (QD-BIRD) shows infrared response at temperatures up to 225 K.
Document ID
20120017934
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Ting, David Z.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Soibel, Alexander
(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)
Keo, Sam A.
(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)
Gunapala, Sarath D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 25, 2013
Publication Date
April 23, 2012
Subject Category
Space Radiation
Meeting Information
Meeting: SPIE Defense and Security Symposium
Location: Baltimore, MD
Country: United States
Start Date: April 23, 2012
End Date: April 27, 2012
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other
Keywords
quantum dot
high operating temperature
midwave infrared
infrared detector
unipolar barrier

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