We have investigated the elastic wave switching based on nonlinear phononic crystals. The phononic crystal structure contains of an input waveguide and two output waveguides that acts as elastic 1 × 2 switch. The input wave with low intensity propagates through bar waveguide; in this case the performance of structure is linear. By increasing the intensity of input wave, nonlinear behavior is appeared and the applied wave propagates through cross waveguide. Increment of the gradient of displacement results in the nonlinear behavior in phononic structure and changing the mass density of the propagation medium. Changing the mass density of constituent materials shifts the frequency of defect modes. By these feature, designing of elastic 1 × 2 switch is realized.

中文翻译：

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两通道全弹性固固声子开关

我们已经研究了基于非线性声子晶体的弹性波切换。声子晶体结构包含一个输入波导和两个用作弹性 1×2 开关的输出波导。低强度的输入波通过棒形波导传播；在这种情况下，结构的性能是线性的。通过增加输入波的强度，出现非线性行为并且施加的波通过交叉波导传播。位移梯度的增加导致声子结构的非线性行为并改变传播介质的质量密度。改变组成材料的质量密度会改变缺陷模式的频率。通过这些特点，实现了弹性1×2开关的设计。