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Proceedings Paper

Demonstration of 640x512 pixels long-wavelength infrared (LWIR) quantum dot infrared photodetector (QDIP) focal plane array
Author(s): S. D. Gunapala; S. V. Bandara; C. J. Hill; D. Z. Ting; J. K. Liu; S. B. Rafol; E. R. Blazejewski; J. M. Mumolo; S. A. Keo; S. Krishna; Y.-C. Chang; C. A. Shott
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Paper Abstract

Epitaxially grown self-assembled InAs/InGaAs/GaAs quantum dots (QDs) are exploited for the development of large-format long-wavelength infrared (LWIR) focal plane arrays (FPAs). The Dot-in-a-Well (DWELL) structures were experimentally shown to absorb both 45° 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 microns, with peak detectivity reaching ~ 1 x 1010 Jones at 77 K. The devices were fabricated into the first long-wavelength 640x512 pixel QDIP imaging FPA, which has produced excellent infrared imagery with noise equivalent temperature difference of 40 mK at 60K operating temperature.

Paper Details

Date Published: 2 February 2007
PDF: 9 pages
Proc. SPIE 6479, Quantum Sensing and Nanophotonic Devices IV, 64790V (2 February 2007); doi: 10.1117/12.698051
Show Author Affiliations
S. D. Gunapala, Jet Propulsion Lab. (United States)
S. V. Bandara, Jet Propulsion Lab. (United States)
C. J. Hill, Jet Propulsion Lab. (United States)
D. Z. Ting, Jet Propulsion Lab. (United States)
J. K. Liu, Jet Propulsion Lab. (United States)
S. B. Rafol, Infravision Systems (United States)
E. R. Blazejewski, Jet Propulsion Lab. (United States)
J. M. Mumolo, Jet Propulsion Lab. (United States)
S. A. Keo, Jet Propulsion Lab. (United States)
S. Krishna, Univ. of New Mexico (United States)
Y.-C. Chang, Univ. of Illinois at Urbana-Champaign (United States)
C. A. Shott, FLIR Systems Inc. (United States)

Published in SPIE Proceedings Vol. 6479:
Quantum Sensing and Nanophotonic Devices IV
Manijeh Razeghi; Gail J. Brown, Editor(s)

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