Acoustic Transmission Enhancement through a Periodically Structured Stiff Plate without Any Opening
Acoustic Transmission Enhancement through a Periodically Structured Stiff Plate without Any Opening
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通过无任何开口的周期性结构刚性板增强声学传输
DOI：
10.1103/physrevlett.105.074301
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发表时间：
2010-08-13
影响因子：
8.6
通讯作者：
Liu, Zhengyou
中科院分区：
文献类型：
--
作者：
He, Zhaojian;Jia, Han;Liu, Zhengyou
我们在实验和理论上都报告了增强的声传输可以发生在亚波长区域，通过薄而硬的结构板没有任何开口。这种奇异的声学现象与以往的相关研究有本质上的区别，这些研究要么是集体的，要么是单独的，都是源于入射波与先前结构中开口的相互作用。这是由于均匀弹性板内部固有的非泄漏兰姆模态的结构诱导共振激励所致。我们的发现将对超声波的应用产生影响。
We report both experimentally and theoretically that enhanced acoustic transmission can occur in the subwavelength region through a thin but stiff structured plate without any opening. This exotic acoustic phenomenon is essentially distinct from the previous related studies originated from, either collectively or individually, the interaction of the incident wave with openings in previous structures. It is attributed to the structure-induced resonant excitation of the nonleaky Lamb modes that exist intrinsically in the uniform elastic plate. Our finding should have an impact on ultrasonic applications.