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Two-color GaAs/-AlGa-As quantum well infrared detector with voltage-tunable spectral sensitivity at 3-5 and 8-12 mym.

Zweifarben GaAs/AlGaAs Quantentopf-Infrarotdetektor mit spannungsabhängiger Empfindlichkeit bei 3-5 und 8-12 mym


Applied Physics Letters 61 (1992), No.6, pp.666-668 : Abb.,Lit.
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IAF ()
infrared detector; Infrarotdetektor; Intersubband-Absorption; multispectral detector; Quantentopf Detektor; quantum well detector

We report on a novel GaAs:Si/(AlGa)As multiquantum well photodetector structure which exhibits photoresponse maxima in both the 8 - 12 and 3 - 5 Mym spectral regions. The relative intensity of these maxima strongly depends on the bias voltage, demonstrating the potential of such a structure as a tunable two-color intersubband detector.