Open AccessLow-index metamaterial designs in the visible spectrum
Author(s) -
Do Hoon Kwon,
Douglas H. Werner
Publication year - 2007
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.15.009267
Subject(s) - metamaterial , optics , refractive index , split ring resonator , metamaterial antenna , permittivity , resonator , electrical impedance , metamaterial absorber , materials science , physics , optoelectronics , computer science , telecommunications , tunable metamaterials , dielectric , antenna (radio) , directional antenna , slot antenna , quantum mechanics
Low-index metamaterial designs in the visible spectrum that are impedance matched to free space are presented. The unit cell of the periodic metamaterial design incorporates a magnetic resonator and silver meshes for respective control of the effective permeability and permittivity. A genetic algorithm is employed to optimize the metamaterial design to achieve a desired set of values for the index of refraction and the intrinsic impedance. Two example GA optimized designs are provided which target the important special cases of a zero and unity index of refraction.