Abstract
We investigate numerically the rectification phenomena of bulk acoustic waves in an acoustic-wave rectifier composed of an elastically anisotropic material containing a periodic array of triangular holes. Paying special attention to the effects of elastic anisotropy on phonon mode coupling, we elucidate the rectification performance for quasi-longitudinal and slow transverse waves. We find that elastic anisotropy markedly improves acoustic-wave rectification in comparison with the system composed of isotropic materials, particularly for longitudinal acoustic waves.
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