Experimental and theoretical studies of the performance of quantum-well infrared photodetectors
- 15 July 1991
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 70 (2), 993-1003
- https://doi.org/10.1063/1.349612
Abstract
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.Keywords
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