Acoustic Surface Evanescent Wave and its Dominant Contribution to Extraordinary Acoustic Transmission and Collimation of Sound
Acoustic Surface Evanescent Wave and its Dominant Contribution to Extraordinary Acoustic Transmission and Collimation of Sound
复制标题
声表面倏逝波及其对非凡声学传输和声音准直的主要贡献
DOI：
10.1103/physrevlett.104.164301
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发表时间：
2010-04-23
影响因子：
8.6
通讯作者：
Ming, Nai-Ben
中科院分区：
文献类型：
--
作者：
Zhou, Yu;Lu, Ming-Hui;Ming, Nai-Ben
我们从理论上和实验上证明了非凡的声学传输和准直的声音通过一维装饰板的物理机制。微观理论将声场看作是平板上每个周期性排列的凹槽的散射波之和，将声场分为远场辐射柱面波和声表面倏逝波（ASEW）。与瑞利波和兰姆波等声表面波不同，声表面波在光学情况下与表面等离子体激元非常相似。通过绘制总场图，实验很好地证实了理论计算与ASEW激发。ASEW概念的提出为亚波长声学器件与结构化固体表面的集成提供了一条新的途径。
We demonstrate both theoretically and experimentally the physical mechanism that underlies extraordinary acoustic transmission and collimation of sound through a one-dimensional decorated plate. A microscopic theory considers the total field as the sum of the scattered waves by every periodically aligned groove on the plate, which divides the total field into far-field radiative cylindrical waves and acoustic surface evanescent waves (ASEWs). Different from the well-known acoustic surface waves like Rayleigh waves and Lamb waves, ASEW is closely analogous to a surface plasmon polariton in the optical case. By mapping the total field, the experiments well confirm the theoretical calculations with ASEWs excited. The establishment of the concept of ASEW provides a new route for the integration of subwavelength acoustic devices with a structured solid surface.