Noise and photoconductivity in single quantum well infrared photodetectors

Maxim Ershov; Alexander N. Korotkov

doi:10.1117/12.304479

8 April 1998 Noise and photoconductivity in single quantum well infrared photodetectors

Maxim Ershov, Alexander N. Korotkov

Proceedings Volume 3287, Photodetectors: Materials and Devices III; (1998) https://doi.org/10.1117/12.304479
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

The noise spectral density off current fluctuations in single quantum well IR photodetectors is calculated using Langevin approach. Fluctuations of the incident photon flux ar taken into account. The dark current noise spectral density has a Lorentzian shape with characteristics frequency equal to inverse time of the QW recharging. This effect is due to the modulation of the injection current by the charge in the QW. The noise gain and the photocurrent gain are expressed in terms of basic transport parameters. The ratio of the noise gain to photocurrent gain is different from unity in general case.

Citation Download Citation

Maxim Ershov and Alexander N. Korotkov "Noise and photoconductivity in single quantum well infrared photodetectors", Proc. SPIE 3287, Photodetectors: Materials and Devices III, (8 April 1998); https://doi.org/10.1117/12.304479

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