Three-dimensional Negative-Refractive-Index Metamaterials Based on All-Dielectric Coated Spheres

Details Three-dimensional Negative-Refractive-Index Metamaterials Based on All-Dielectric Coated Spheres Three-dimensional Negative-Refractive-Index Metamaterials Based on All-Dielectric Coated Spheres

2010-04-27

arxiv.org/abs/1004.4694v1

Physics

Optics

10 pages,5 figures

Scientific paper

A type of 3-dimensional optical negative-refractive-index metamaterials composed of all dielectric nanospheres is proposed and demonstrated theoretically. The metamaterials are constructeded by pairing together two kinds of dielectric nanospheres as concentric shells embedded in a host medium. Mie-based extended effective theory shows that the dielectric core and the dielectric shell provide the negative permeability and the negative permittivity, respectively, both due to the strong Mie resonances. Within the coupled resonant frequency region, the negative index of refraction can be achieved.

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