A high performance InGaAs/GaAs/AlGaAs superlattice coupled (SC) quantum well infrared photodetector (QWIP) grown on GaAs has been developed for long wavelength infrared detection. The dark I-V and spectral response were measured and analysed on this device. Excellent responsivity and detectivity were obtained for this SC-QWIP. The peak detectivity (D*) and collection quantum efficiency (ηg) under background limited performance (BLIP) condition were found to be DBLIP* = 8.36 × 1010 cm-Hz1/2/W and ηg = 18.8% at λp = 10.5 µm, Vb = 2.5 V, and T = 20 K.
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Moon et al. (2001) studied this question.
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