Enhancement of asymmetric acoustic transmission

Enhancement of asymmetric acoustic transmission
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增强不对称声学传输

DOI:
10.1063/1.4798277
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发表时间:
2013-03
影响因子:
4
通讯作者:
Zhang, Shu-yi
Zhang, Shu-yi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Sun, Hong-xiang;Zhang, Shu-yi

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我们从实验和理论上报告了通过将周期性光栅与金属板耦合来实现增强的单向声传输。这种奇特的声学现象归因于结构引起的漏兰姆模式的共振激发,该共振激发是由于衍射波与位于光栅和金属板界面处的共振表面态的耦合而产生的。更重要的是,我们进一步优化了结构,引入了两个斜板,可以将反射能量转换为透射能量。我们的发现在超声波设备中具有巨大的应用潜力。
We report both experimentally and theoretically that enhanced one-way acoustic transmission is realized by coupling a periodical grating with metal plates. This exotic acoustic phenomenon is attributed to the structure-induced resonant excitation of the leaky Lamb modes which arise from the coupling of the diffracted waves with the resonant surface states localized at the interface of the grating and the metal plate. More importantly, we further optimize the structure by introducing two inclined plates, which can convert the reflected energy into the transmitted energy. Our finding has great potential applications in ultrasonic devices.
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