Mid-infrared photodetection in an AlGaAs/GaAs quantum-well infrared photodetector using photoinduced noise
- Instituto de Física da Universidade de São Paulo, Rua do Matão, travessa R, 187, 05508-090 São Paulo, SP (Brazil)
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.
- OSTI ID:
- 22492978
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 20 Vol. 118; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of bias and temperature on the intersubband absorption in very long wavelength GaAs/AlGaAs quantum well infrared photodetectors
Growth of AlGaAs and AlGaAs/GaAs heterostructures on misoriented (110)GaAs and a normal incidence type-II AlAs/AlGaAs quantum well infrared photodetector