Physics and technology of antimonide heterostructure devices at SCD

Philip Klipstein

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

SCD has developed a range of advanced infrared detectors based on III-V semiconductor heterostructures, grown on GaSb. The XBn/XBp family of detectors enables diffusion limited behavior with dark currents comparable with MCT Rule-07 and with high quantum efficiencies. InAsSb/AlSbAs based XBn focal plane array detectors with a cut-off wavelength of ∼ 4.1 μm and formats presently up to 1024×1280 / 15 μm, operate with background limited performance up to ∼175 K at F/3. They have a sensitivity and image quality comparable with those of standard InSb detectors working at 77K. In an XBp configuration, the same concept has been applied to an InAs/GaSb type II superlattice (T2SL) detector with a cut-off wavelength of ∼ 9.5 μm, which operates with background limited performance up to ∼100 K at F/2. In order to design our detectors effectively, a suite of simulation algorithms was developed based on the k<. p and optical transfer matrix methods. In a given T2SL detector, the complete spectral response curve can be predicted essentially from a knowledge of the InAs and GaSb layer widths in a single period of the superlattice. Gallium free T2SL detectors in which the GaSb layer is replaced with InAs1-xSbx (x ∼ 0.15-0.5) have also been simulated and the predicted spectral response compared for the two detector types.

Original languageEnglish
Title of host publicationQuantum Sensing and Nanophotonic Devices XII
EditorsManijeh Razeghi, Eric Tournie, Gail J. Brown
PublisherSPIE
ISBN (Electronic)9781628414608
DOIs
StatePublished - 2015
Externally publishedYes
EventQuantum Sensing and Nanophotonic Devices XII - San Francisco, United States
Duration: 8 Feb 201512 Feb 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9370
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceQuantum Sensing and Nanophotonic Devices XII
Country/TerritoryUnited States
CitySan Francisco
Period8/02/1512/02/15

Bibliographical note

Publisher Copyright:
© 2015 SPIE.

Keywords

  • Infrared detector
  • Type II superlattice
  • XBn
  • XBp
  • focal plane array
  • gallium free superlattice

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