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For an acoustic diode (AD) model formed by coupling a superlattice with a nonlinear medium, the transmission of acoustic wave is investigated as a function of frequency in a numerical manner. The important phenomenon of rectifying effect of acoustic energy flux is identified in a series of frequency bands whose locations agree exactly with the analytical predictions. Within these frequency bands, the AD can exhibit extremely high rectifying efficiency and strong resistance to “reverse breakdown.” These results are particularly of practical significance for the potential design and application of ADs.
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Liang et al. (2010) studied this question.
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