Experimental and theoretical studies of the performance of quantum-well infrared photodetectors

We report on the performance of GaAs/AlGaAs quantum-well infrared detectors exhibiting intersubband absorption in the 8–14 μm band. The dark current characteristics have been investigated as a function of barrier width and electron density in the well and compared with a model which takes into accou...

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Published in:Journal of applied physics 1991-07, Vol.70 (2), p.993-1003
Main Authors: ANDREWS, S. R, MILLER, B. A
Format: Article
Language:English
Subjects:
Bolometer
infrared, submillimeter wave, microwave and radiowave receivers and detectors
Exact sciences and technology
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
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description We report on the performance of GaAs/AlGaAs quantum-well infrared detectors exhibiting intersubband absorption in the 8–14 μm band. The dark current characteristics have been investigated as a function of barrier width and electron density in the well and compared with a model which takes into account thermionic emission and thermally assisted tunneling in the Wentzel–Kramers–Brillouin approximation. The model gives a good description of the data and is extended to predict the variation of detectivity and background limited operating temperature with structural parameters.
doi_str_mv 10.1063/1.349612
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subjects Bolometer
infrared, submillimeter wave, microwave and radiowave receivers and detectors
Exact sciences and technology
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
title Experimental and theoretical studies of the performance of quantum-well infrared photodetectors
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