In this study, we have realized a bicolor switchable detector, in which tunneling between two quantum well detectors of different widths is used to populate or deplete their ground level. The behavior of the bicolor detector is simulated using a self-consistent model, which shows that under electric field, only the downstream well detects. The performance of the sample as a modulator and as a bicolor detector are analyzed in a Fourier transform infrared spectrometer.
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Berger et al. (1992) studied this question.