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Nonsingularity in two-dimensional cylindrical invisible cloaks |
Wang Xin-Hua(王新华)a)†, Qu Shao-Bo(屈绍波) a)b)‡, Xia Song(夏颂)b), Wang Bin-Ke(王斌科)a), Xu Zhuo(徐卓)b), Ma Hua(马华)a), Wang Jia-Fu(王甲富)a), Gu Chao(顾超)a), Wu Xiang(吴翔)a), Lu Lei(鲁磊)a), and Zhou Hang(周航)a) |
a College of Science, Air Force Engineering University, Xi'an 710051, China; b Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract The method of designing electromagnetic invisible cloaks is usually based on the form-invariance of Maxwell's equations in coordinate transformation. The exterior boundary of a cylindrical invisible cloak is unchanged and the interior boundary is extended from that of a point to that of a cylindrical region in coordination transformation. This transformation process makes perfect cloaks, but it causes singularity in the constitutive material parameters of cloaks. This singularity makes the cloaks impossible to realize in practice. In order to remove this singularity, this paper sets a small cylindrical region replacing a point in the space transformation. The cylindrical region is so small that it does not affect the invisibility effects, but it can remove the singularity for material parameters. Full wave simulations based on the finite element method were used to verify the designed cloaks.
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Received: 20 July 2009
Accepted manuscript online:
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PACS:
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03.50.De
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(Classical electromagnetism, Maxwell equations)
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02.70.Dh
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(Finite-element and Galerkin methods)
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Fund: Project supported partly by the
National Natural Science Foundation of China (Grant Nos.~50632030,
10474077, and 60871027), partly by the National Basic Research
Program of China (Grant No.~2009CB613306), and partly by the
Natural Science Foundation of Sh |
Cite this article:
Wang Xin-Hua(王新华), Qu Shao-Bo(屈绍波), Xia Song(夏颂), Wang Bin-Ke(王斌科), Xu Zhuo(徐卓), Ma Hua(马华), Wang Jia-Fu(王甲富), Gu Chao(顾超), Wu Xiang(吴翔), Lu Lei(鲁磊), and Zhou Hang(周航) Nonsingularity in two-dimensional cylindrical invisible cloaks 2010 Chin. Phys. B 19 064102
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