Achieving invisibility over a finite range of frequencies
Achieving invisibility over a finite range of frequencies
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DOI：
10.1364/oe.16.005656
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发表时间：
2008-04-14
期刊：
影响因子：
3.8
通讯作者：
Enoch, S.
中科院分区：
文献类型：
--
作者：
Farhat, M.;Guenneau, S.;Enoch, S.
我们通过径向对称金属结构的均质化来分析横向电场（TE）的隐身。二维圆形斗篷由切割成大量小无限导电扇区的同心层组成，相当于高度各向异性的介电常数。我们发现，距离斗篷几个波长的磁力线电流源辐射的波在幅度上几乎不受干扰，但在相位上却不受干扰。我们的结构化斗篷被证明可以适用于不同的波长，前提是它们比最外层扇区大十倍。 (C) 2008 年美国光学学会。
We analyze cloaking of transverse electric (TE) fields through homogenization of radially symmetric metallic structures. The two-dimensional circular cloak consists of concentric layers cut into a large number of small infinitely conducting sectors which is equivalent to a highly anisotropic permittivity. We find that a wave radiated by a magnetic line current source located a couple of wavelengths away from the cloak is almost unperturbed in magnitude but not in phase. Our structured cloak is shown to work for different wavelengths provided they are ten times larger than the outermost sectors. (C) 2008 Optical Society of America.