Making waves round a structured cloak: lattices, negative refraction and fringes.
Making waves round a structured cloak: lattices, negative refraction and fringes.
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DOI：
10.1098/rspa.2013.0218
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发表时间：
2013-09-08
期刊：
影响因子：
--
通讯作者：
McPhedran RC
中科院分区：
文献类型：
--
作者：
Colquitt DJ;Jones IS;Movchan NV;Movchan AB;Brun M;McPhedran RC
本文利用变换光学的理论框架，详细分析了一种非奇异的方形隐身罩，它能有效地抑制声波、离面剪切弹性波和电磁波的传播。波的传播通过斗篷的分析，并附有数值说明。证明了正则化斗篷的有效性，并提供了一个客观的数值测量质量的隐身效果。结果表明，隐身效应在很宽的频率范围内持续存在。作为正则化斗篷的有效性的演示，杨氏双缝实验。干涉图样的稳定性检查时，隐形和隐形的障碍物被连续放置在前面的一个光圈。这种与著名的量子力学实验的新颖联系提供了一种额外的方法，通过这种方法可以检查斗篷的质量。在后半部分的文件中，它表明，一个近似的斗篷可以使用离散的晶格结构。分析了近似网格斗篷的效率，并给出了一系列说明性的模拟。它表明，有效的隐身可以通过使用一个相对简单的晶格结构，特别是在低频制度。
Using the framework of transformation optics, this paper presents a detailed analysis of a non-singular square cloak for acoustic, out-of-plane shear elastic and electromagnetic waves. Analysis of wave propagation through the cloak is presented and accompanied by numerical illustrations. The efficacy of the regularized cloak is demonstrated and an objective numerical measure of the quality of the cloaking effect is provided. It is demonstrated that the cloaking effect persists over a wide range of frequencies. As a demonstration of the effectiveness of the regularized cloak, a Young's double slit experiment is presented. The stability of the interference pattern is examined when a cloaked and uncloaked obstacle are successively placed in front of one of the apertures. This novel link with a well-known quantum mechanical experiment provides an additional method through which the quality of cloaks may be examined. In the second half of the paper, it is shown that an approximate cloak may be constructed using a discrete lattice structure. The efficiency of the approximate lattice cloak is analysed and a series of illustrative simulations presented. It is demonstrated that effective cloaking may be obtained by using a relatively simple lattice structure, particularly, in the low-frequency regime.
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发表时间：
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影响因子：
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