Extending the bandwidth of electromagnetic cloaks

被引：124

作者：

Chen, Huanyang ^{[1
,2
]}

Liang, Zixian ^{[3
]}

Yao, Peijun ^{[3
]}

Jiang, Xunya ^{[1
,3
]}

Ma, Hongru ^{[2
]}

Chan, C. T. ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowlong, Hong Kong, Peoples R China

[2] Shanghai Jiao Tong Univ, Inst Theoret Phys, Shanghai 200240, Peoples R China

[3] Chinese Acad Sci, Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.76.241104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using the idea of a transformation medium, a cloak can be designed to make a domain invisible to one target frequency. We examine the possibility of extending the bandwidth of such a cloak. We find that causality requirements impose severe constraints on the system parameters of the transformation medium, and we show that a specific form of "reduction" can help us to create a cloak that offers a reduced cross section in a finite frequency range. We also give a simple inequality that limits the bandwidth of operation.

引用

页数：4

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