论文标题
非现行弹性波传播的有效语音晶体
Effective Phononic Crystals for Non-Cartesian Elastic Wave Propagation
论文作者
论文摘要
我们介绍了有效的语音晶体的概念，该概念将周期性与各向同性材料的特性结合起来，以在非牙龈的基础上迫使运动弹性方程中的周期系数。周期性系数允许使用Bloch定理进行带结构计算。使用频带结构，我们可以在圆柱传播波中获得带隙和拓扑保护的界面模式。通过有效的音调晶体，我们展示了如何在靠近野外效应不可忽略的区域中实现笛卡尔语音晶体的行为。
We introduce the concept of effective phononic crystals, which combine periodicity with varying isotropic material properties to force periodic coefficients in the elastic equations of motion in a non-Cartesian basis. Periodic coefficients allow for band structure calculation using Bloch theorem. Using the band structure, we demonstrate band gaps and topologically protected interface modes can be obtained in cylindrically propagating waves. Through effective phononic crystals, we show how behaviors of Cartesian phononic crystals can be realized in regions close to sources, where near field effects are non-negligible.
