弯曲周期性层状结构的变换声学
Bending a periodically layered structure for transformation acoustics
摘要：
各向异性声学超材料在引导和操纵声音能量方面具有很大的潜力，已被证明是非常有用的。在本文中，我们进一步发展的想法，通过使用周期性分层结构的变换声学。这样一个简单的方案周期性地将相同弯曲的固体板插入背景流体中。它形成了一种超材料，具有垂直于弯曲板的高折射率和沿着板的接近1的折射率。我们表明，周期性分层结构，结合变换的方法，可以切割成特定的设备形状的声学隐身和错觉。
英文摘要：
Anisotropic acoustic metamaterials have been proved very useful for their high potential in guiding and manipulating sound energy. In this paper, we further develop the idea by using periodically layered structures for transformational acoustics. Such a simple scheme periodically inserts identically bent solid plates in a background fluid. It forms a metamaterial with high refractive index normal to the curved plates and an index near to one along the plates. We show that the periodically layered structure, combined with transformation approach, can be cut into particular device shapes for acoustic cloaking and illusion.
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