Mid/far-infrared photodetectors based on quantum coherence in coupled quantum wells

Abstract

We propose mid/far-infrared photodetectors based on coherent sum-frequency generation in a near-resonant cascade of interband and intersubband transitions in high optical nonlinearity asymmetric quantum well structures. Such structures can yield high detectivity and responsivity in the bandwidth of the order of 30% of a central frequency in the mid-infrared… (More)

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