Extending the bandwidth of electromagnetic cloaks

被引：123
|
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
收藏
页数：4
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