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Noise current investigations of g-r noise limited and shot noise limited QWIPs

Rauschstromuntersuchungen an G-R Rausch-limitierten und Schrot-Rausch-limitierten QWIPs
: Rehm, R.; Schneider, H.; Schönbein, C.; Walther, M.


Physica. E 7 (2000), No.1/2, pp.124-129
ISSN: 1386-9477
Journal Article
Fraunhofer IAF ()
quantum well infrared detector; Quantumwell Infrarot-Detektor; QWIP; Johnson noise; Johnson-Rauschen; g-r noise; G-R Rauschen; infrared detector; Infrarotdetektor; GaAs/AlGaAs

We report on the experimental determination of the different contributions to the noise current in quantum-well infrared photodetectors (QWIPs). A detailed description of the measurement set-up and experimental methods is given. The noise properties of conventional bound-to-continuum QWIPs and four-zone QWIPs will be discussed. The noise current of these devices is dominated by g-r noise and by shot noise, respectively.