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Construction of a chiral metamaterial with a U-shaped resonator assembly

2010; American Physical Society; Volume: 81; Issue: 7 Linguagem: Inglês

10.1103/physrevb.81.075119

1550-235X

Xiang Xiong, Wei-Hua Sun, Yong-Jun Bao, Mu Wang, Ru-Wen Peng, Cheng Sun, Xiang Lü, Jun Shao, Zhi-Feng Li, Nai-Ben Ming,

Electromagnetic Scattering and Analysis

Chiral structure can be applied to construct metamaterial with negative refractive index (NRI). In an assembly of double-layered metallic U-shaped resonators with two resonant frequencies wH and wL, the effective induced electric and magnetic dipoles, which are contributed by the specific surface current distributions, are collinear at the same frequency. Consequently, for left circularly polarized light, NRI occurs at wH, whereas for right circularly polarized light it occurs at wL. Our design provides a new example to apply chiral structures to tune electromagnetic properties, and could be enlightening in exploring chiral metamaterials.