Open AccessRainbow-like radiation from an omni-directional source placed in a uniaxial metamaterial slab
Author(s) -
Tao Jiang,
Yu Luo,
Zhiyu Wang,
Liang Peng,
Jiangtao Huangfu,
Wanzhao Cui,
Wei Ma,
Hongsheng Chen,
Lixin Ran
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.007068
Subject(s) - slab , optics , metamaterial , electromagnetic radiation , radiation , anisotropy , line source , materials science , physics , geophysics
In this paper, the radiation of an omni-directional line source placed in a uniaxial metamaterial slab is experimentally presented. The anisotropic slab made of metallic symmetrical rings with dispersive permeability is investigated both theoretically and experimentally. For low value of the permeability, a directive radiation at the broadside of the slab can be obtained. Due to the excitation of the leaky wave mode supported by this structure, the emitted electromagnetic wave transmits at a greater angle from the normal of the slab as the value of permeability increases along with the frequency. Thus a rainbow-like radiation will be formed since waves of different frequencies will deflect into different directions.