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Title: Mid-infrared photodetection in an AlGaAs/GaAs quantum-well infrared photodetector using photoinduced noise

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.
Authors:
 [1] ;  [2] ; ;  [1]
  1. Instituto de Física da Universidade de São Paulo, Rua do Matão, travessa R, 187, 05508-090 São Paulo, SP (Brazil)
  2. (Brazil)
Publication Date:
OSTI Identifier:
22492978
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINIUM ARSENIDES; DETECTION; ELECTRONIC CIRCUITS; GALLIUM ARSENIDES; INFRARED RADIATION; PHOTODETECTORS; QUANTUM WELLS; SIGNALS; WAVELENGTHS