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Proceedings Paper

Quantum well infrared photodetectors (QWIPs) for astronomy
Author(s): Sarath D. Gunapala; Sumith V. Bandara; John K. Liu; Edward M. Luong; James J. Bock; Michael E. Ressler; Michael W. Werner
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Paper Abstract

In recent years, many research groups in the world have demonstrated large format quantum well IR photodetector (QWIP) focal pane arrays for various thermal imaging applications. QWIPs as opposed to conventional low bandgap IR detectors, are limited by thermionic dark current and not tunneling current down to 30K or less. As a result the performance of QWIPs can be substantially improved by cooling from 70K to 30K. Cooling does not induce any nonuniformity or 1/f noise in QWIP focal plane arrays. In this paper, we discuss the development of highly uniform long-wavelength QWIPs for astronomical applications.

Paper Details

Date Published: 11 August 1998
PDF: 8 pages
Proc. SPIE 3553, Detectors, Focal Plane Arrays, and Imaging Devices II, (11 August 1998); doi: 10.1117/12.318096
Show Author Affiliations
Sarath D. Gunapala, Jet Propulsion Lab. (United States)
Sumith V. Bandara, Jet Propulsion Lab. (United States)
John K. Liu, Jet Propulsion Lab. (United States)
Edward M. Luong, Jet Propulsion Lab. (United States)
James J. Bock, Jet Propulsion Lab. (United States)
Michael E. Ressler, Jet Propulsion Lab. (United States)
Michael W. Werner, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 3553:
Detectors, Focal Plane Arrays, and Imaging Devices II
Pingzhi Liang; Marc Wigdor; William G. D. Frederick, Editor(s)

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