Abstract
A scheme of tunneling-induced perfect absorption is proposed in an intracavity quantum-well (QW) system. In the linear case, the cavity transmission is found to be narrowed and weakened with respect to an empty cavity. In the nonlinear case, the resonant tunneling induces constructive interference for the nonlinear absorption, with the total absorption dramatically enhanced. For the cavity modes close to the QW resonant frequency, the cavity field can be completely absorbed, and the tunneling-induced perfect absorption (TPA) effect appears in the cavity transmission. The intensities of the control field and inter-well coupling broaden the TPA bandwidth, and the frequency detuning of the control field shifts the TPA window.
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