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Proceedings Paper

Optimized multiquantum well infrared detectors
Author(s): Philippe Francis Bois; Eric M. Costard; Jean-Yves Duboz; Julien Nagle; Emmanuel Rosencher; Borge Vinter
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Paper Abstract

Quantum well infrared photodetectors (QWIPs) form a new generation of infrared detectors based on carrier confinement in ultrathin semiconductor heterostructures. The artificial energy levels in these wells can be tailored to match any optical transition in the 3 - 20 micrometer photon wavelength range by adjusting the quantum well width and the barrier composition. In this communication, we summarize our present understanding of the physics of QWIP detection: photoexcited carrier emission and capture probability, contact injection, and noise mechanisms. We also present the performances of optimized devices for the infrared Detection in the 3 - 5 micrometer and 8 - 12 micrometer wavelength ranges. We also illustrate the major advantages of this new technology for infrared staring arrays: (1) standard III-V substrates and technology, thermal stability, uniformity, large areas, low development costs, radiation hardness, (2) adjustability from 3 to 20 micrometer, (3) new functions: multispectrality, spectrophotometry, band switching, optical reading.

Paper Details

Date Published: 8 September 1995
PDF: 12 pages
Proc. SPIE 2552, Infrared Technology XXI, (8 September 1995); doi: 10.1117/12.218275
Show Author Affiliations
Philippe Francis Bois, Thomson-CSF (France)
Eric M. Costard, Thomson-CSF (France)
Jean-Yves Duboz, Thomson-CSF (France)
Julien Nagle, Thomson-CSF (France)
Emmanuel Rosencher, Thomson-CSF (France)
Borge Vinter, Thomson-CSF (France)

Published in SPIE Proceedings Vol. 2552:
Infrared Technology XXI
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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