Transmission enhancement of acoustic waves through a thin hard plate embedded with elastic inclusions
Transmission enhancement of acoustic waves through a thin hard plate embedded with elastic inclusions
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通过嵌入弹性夹杂物的薄硬板增强声波的传输
DOI：
10.1063/1.4736564
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发表时间：
2012-07-09
影响因子：
4
通讯作者：
Liu, Zhengyou
中科院分区：
文献类型：
--
作者：
Hao, Rui;Qiu, Chunyin;Liu, Zhengyou
本文研究了声波通过水中嵌有弹性夹杂的硬质薄板的透射响应。透射谱在亚波长区有一个明显的峰，峰的位置与入射角几乎无关。我们的研究表明，透射增强源于包体中局域弯曲模的共振激发。与众所周知的法布里-珀罗效应不同，这里的谐振频率随着样品变薄而迅速降低。实验进一步验证了理论的正确性。这种薄板结构所产生的反常透射效应具有潜在的应用前景。
We study the transmission response of acoustic waves through a water-immersed thin hard plate embedded with elastic inclusions. The transmission spectra show a striking peak at the subwavelength region, whose position is almost irrelevant with the incident angle. Our study states that the transmission enhancement stems from the resonant excitation of the localized bending mode in the inclusion. Different from the well-known Fabry-Perot effect, here the resonant frequency reduces rapidly as the sample is thinned down. The theory is further validated by experiment. Potential applications of the abnormal transmission effect produced by such thin plate structures can be anticipated.