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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Broadband and flexible acoustic focusing by metafiber bundles
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Broadband and flexible acoustic focusing by metafiber bundles

机译:宽带和灵活的声学聚焦由Metafiber捆绑

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摘要

We report a broadband and flexible acoustic focusing through metafiber bundles in air, in which each metafiber consists of eight circular and narrow rectangular cavities. The fractional bandwidth of the acoustic focusing could reach about 0.2, which arises from the eigenmodes of the metafiber structure. Besides, owing to the flexible characteristic of the metafibers, the focus position can be manipulated by bending the metafiber bundles, and the metafiber bundles could bypass rigid scatterers inside the lens structure. More interestingly, the acoustic propagation and focusing directions can be changed by using a designed right-angled direction converter fabricated by the metafibers, and a waveform converter and a focusing lens of the cylindrical acoustic source are realized based on the metafiber bundles. The proposed focusing lens has the advantages of broad bandwidth, flexible structure, and high focusing performance, showing great potentials in versatile applications.
机译:我们通过空气中的宽带和柔性声学向宽带和柔性的声学,其中每个金属纤维由八个圆形和窄矩形腔组成。 声学聚焦的分数带宽可以达到约0.2,从法代域结构的特征模出产生。 此外,由于所述网格的灵活特性,可以通过弯曲法纤维束来操纵焦点位置,并且由法甲束可以绕过透镜结构内的刚性散射体。 更有趣的是,可以通过使用由法式制造的设计的右倾方向转换器来改变声学传播和聚焦方向,并且基于由法属纤维束来实现波形转换器和圆柱形声源的聚焦透镜。 所提出的聚焦镜片具有广泛的带宽,柔性结构和高的聚焦性能优点,显示出多功能应用的巨大潜力。

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