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Optimized performance of quantum well intersubband infrared detectors - photovoltaic versus photoconductive operation.

Optimierte Eigenschaften von Quantumwell-Intersubband-Infrarotdetektoren - Photovoltaische Arbeitsweise gegenüber photoleitender Arbeitsweise
: Schneider, H.


Journal of applied physics 74 (1993), No.7, pp.4789-4791
ISSN: 0021-8979
ISSN: 1089-7550
Journal Article
Fraunhofer IAF ()
infrared detector; Infrarotdetektor; intersubband transition; Intersubband-Übergang; photovoltaic; photovoltaisch; quantum wells

A recently demonstrated transport mechanism giving rise to novel photovoltaic multiquantum well intersubband infrared detectors is analyzed theoretically. It is shown that optimized photovoltaic devices have detectivities that can be even larger than those of photoconductive ones. In addition, they have a high dynamic range and are particularly suited for the large photon fluxes occurring in the 8-12 mym regime.