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Author Fernandes, F. M. ♦ Silva, E. C. F. da ♦ Quivy, A. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ALUMINIUM ARSENIDES ♦ DETECTION ♦ ELECTRONIC CIRCUITS ♦ GALLIUM ARSENIDES ♦ INFRARED RADIATION ♦ PHOTODETECTORS ♦ QUANTUM WELLS ♦ SIGNALS ♦ WAVELENGTHS
Abstract We propose a new way to assess the output signal of a quantum-well infrared photodetector (QWIP). Instead of measuring the photocurrent produced by the device, as usually done, we show that the noise induced by the absorption process can be used to generate a useful detection signal. We built a simple electronic circuit able to quantify the noise of an AlGaAs/GaAs QWIP that was intentionally designed to produce no photocurrent at all, and we demonstrated that such a circuit was able to generate a strong output signal whenever an infrared radiation of a specific wavelength was shed on the detector. This concept opens new possibilities for the design of novel types of photodetection systems.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-28
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 20


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