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Proceedings Paper

Quantum well infrared photodetectors for long-wavelength infrared applications
Author(s): Sumith V. Bandara; Sarath D. Gunapala; John K. Liu; Edward M. Luong; Jason M. Mumolo; Mark J. McKelvy; Winn Hong
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Paper Abstract

Quantum Well Infrared Photodetectors (QWIPs) offer greater flexibility than usual extrinsically doped semiconductor IR detectors because the wavelength of the peak response and cutoff can be continuously tailored by varying layer thickness (well width), barrier composition (barrier height), and carrier density (well doping density). The GaAs/AlxGa1- xAs material system allows the quantum well parameters to be varied over a range wide enough to enable light detection at any wavelength range between 6 - 20 micrometer. The spectral band width of these detectors can be tuned from narrow ((Delta) (lambda) /(lambda) approximately 10%) to wide ((Delta) (lambda) /(lambda) approximately 40%), allowing various applications. Also, QWIP device parameters can be optimized to achieve extremely high performance at lower operating temperatures (approximately 40 K) for low background, long- wavelength, infrared applications in the strategic arena as well as in Astronomy. Furthermore, QWIPs offer low cost per pixel and highly uniform, large format, focal plane arrays (FPAs) mainly due to mature GaAs/AlGaAs growth and processing technologies.

Paper Details

Date Published: 26 October 1998
PDF: 5 pages
Proc. SPIE 3436, Infrared Technology and Applications XXIV, (26 October 1998); doi: 10.1117/12.328000
Show Author Affiliations
Sumith V. Bandara, Jet Propulsion Lab. (United States)
Sarath D. Gunapala, Jet Propulsion Lab. (United States)
John K. Liu, Jet Propulsion Lab. (United States)
Edward M. Luong, Jet Propulsion Lab. (United States)
Jason M. Mumolo, Jet Propulsion Lab. (United States)
Mark J. McKelvy, Jet Propulsion Lab. (United States)
Winn Hong, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 3436:
Infrared Technology and Applications XXIV
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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