Transformation optics: approaching broadband electromagnetic cloaking

被引:57
作者
Kildishev, A. V. [1 ]
Cai, W. [1 ,2 ]
Chettiar, U. K. [1 ]
Shalaev, V. M. [1 ]
机构
[1] Purdue Univ, Sch Elect & Comp Engn, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
[2] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA
关键词
D O I
10.1088/1367-2630/10/11/115029
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
An approach to broadband cloaking of light waves is analysed for a simplified case of a scaling transformation for a general cylindrical coordinate system. The proposed approach requires metamaterials with specifically engineered dispersion. The restriction on the signs of gradients in the dispersion dependencies of the dielectric permittivity and the magnetic permeability for different operational wavelengths is revealed and is shown to cause difficulties unless additional gain-assisted compensation for losses or electromagnetically induced transparency is introduced in the cloaking system.
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页数:13
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