2003•Applied Physics LettersOpen access

Photocurrent noise in multi-quantum-well infrared photodetectors

A. Carbone, R. Introzzi, H. C. Liu

Abstract

We report on photocurrent noise in AlGaAs/GaAs quantum-well infrared photodetectors having nominally the same design, except the number of wells N. The power spectral density does not scale as the inverse of the number of wells N in the presence of infrared radiation. These features can be understood by taking into account the nonlinearity arising at high infrared power as a consequence of the nonuniform potential distribution through the quantum-well structure.

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Key concepts: Quantum well infrared photodetector, Photocurrent, Infrared, Photodetector, Quantum well, Optoelectronics, Noise (video), Physics