Tunable enhancement of the acoustic radiation pressure acting on a rigid wall via attaching a metamaterial slab
Tunable enhancement of the acoustic radiation pressure acting on a rigid wall via attaching a metamaterial slab
复制标题
通过连接超材料板可调节增强作用于刚性墙壁上的声辐射压力
DOI：
10.1209/0295-5075/105/64004
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发表时间：
2014
期刊：
影响因子：
1.8
通讯作者：
Liu Zhengyou
中科院分区：
文献类型：
--
作者：
Xu Shengjun;Qiu Chunyin;Ke Manzhu;Liu Zhengyou
We demonstrate that the acoustic radiation pressure acting on a rigid wall can be remarkably enhanced by introducing a supplementary metamaterial slab. The dramatic effect stems from the resonant excitation of the acoustic field sandwiched between the rigid wall and the metamaterial slab. Simple formulae for both the enhancement factor and the resonant wavelength are derived analytically, which coincide well with numerical results and exhibit excellent tunability via flexibly tailoring the metamaterials. The acoustic radiation pressure with such tunable magnification could be potentially useful, such as in designing ultrasound instruments and sensors.
