Scattering theory derivation of a 3D acoustic cloaking shell
Scattering theory derivation of a 3D acoustic cloaking shell
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DOI：
10.1103/physrevlett.100.024301
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发表时间：
2008-01-18
影响因子：
8.6
通讯作者：
Starr, Anthony
中科院分区：
文献类型：
--
作者：
Cummer, Steven A.;Popa, Bogdan-Ioan;Starr, Anthony
通过声散射理论，我们推导出的质量密度和体积模量的球壳，可以消除散射从任意物体在壳的内部，换句话说，一个三维的声学隐身壳。计算证实，压力场和速度场是平滑弯曲的，并排除在中心区域，如以前报道的电磁隐身炮弹。壳需要具有在球坐标方向上的主轴的各向异性质量密度和径向依赖的体积模量。这个三维隐形壳的存在表明，这种无反射的解决方案也可能存在于其他波系统，不同构的电磁。
Through acoustic scattering theory we derive the mass density and bulk modulus of a spherical shell that can eliminate scattering from an arbitrary object in the interior of the shell-in other words, a 3D acoustic cloaking shell. Calculations confirm that the pressure and velocity fields are smoothly bent and excluded from the central region as for previously reported electromagnetic cloaking shells. The shell requires an anisotropic mass density with principal axes in the spherical coordinate directions and a radially dependent bulk modulus. The existence of this 3D cloaking shell indicates that such reflectionless solutions may also exist for other wave systems that are not isomorphic with electromagnetics.