Optical anisotropic metamaterials: Negative refraction and focusing

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.

7 pages, 9 figures

References in corpus (6)

• Optical Hyperlens: Far-field imaging beyond the diffraction limit
• Directed sub-wavelength imaging using a layered metal-dielectric system
• Nanowire metamaterials with extreme optical anisotropy
• Sub-wavelength imaging at infrared frequencies using an array of metallic nanorods
• Negative refraction and sub-wavelength imaging using transparent metal-dielectric stacks
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• Liquid crystal hyperbolic metamaterial for wide-angle negative-positive refraction and reflection
• Photonic density of states enhancement in finite graphene multilayers
• Veselago lens by photonic hyper-crystals
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• Point Group Symmetry and Deformation Induced Symmetry Breaking of Superlattice Materials
• Topological band theory of a generalized eigenvalue problem with Hermitian matrices: Symmetry-protected exceptional rings with emergent symmetry
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• Observation of photonic spin-momentum locking due to coupling of achiral metamaterials and quantum dots
• Actively controlling the topological transition of dispersion based on electrically controllable metamaterials
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• Ultrathin optical switch based on a liquid crystal/silver nanoparticles mixture as a tunable indefinite medium
• Negative refraction at deep-ultraviolet frequency in monocrystalline graphite