Optical anisotropic metamaterials: Negative refraction and focusing

TitleOptical anisotropic metamaterials: Negative refraction and focusing
Publication TypeJournal Article
Year of Publication2009
AuthorsFang A, Koschny T, Soukoulis CM
Journal TitlePhysical Review B
Volume79
Pages245127
Date Published06/01
ISBN Number1098-0121
Accession NumberISI:000267699700061
Keywordsanisotropic media, index, media, metamaterials, nanowires, optical materials, photonic crystals, refractive index, slabs
Abstract

We design three-dimensional (3D) metallic nanowire media with different structures and numerically demonstrate that they can be homogeneous effective indefinite anisotropic media by showing that their dispersion relations are hyperbolic. For a finite slab, a nice fitting procedure is exploited to obtain the dispersion relations from which we retrieve the effective permittivities. The pseudo focusing for the real 3D wire medium agrees very well with the homogeneous medium having the effective permittivity tensor of the wire medium. Studies also show that in the long-wavelength limit, the hyperbolic dispersion relation of the 3D wire medium can be valid even for evanescent modes.

URL<Go to ISI>://000267699700061
DOI10.1103/Physrevb.79.245127