Nanowire waveguide made from extremely anisotropic metamaterials

Abstract

Exact solutions are obtained for all the modes of wave propagation along an anisotropic cylindrical waveguide. Closed-form expressions for the energy flow on the waveguide are also derived. For extremely anisotropic waveguide where the transverse permittivity is negative while the longitudinal permittivity is positive, only transverse magnetic (TM) and hybrid modes will propagate on the waveguide. At any given frequency the waveguide supports an infinite number of eigenmodes. Among the TM modes, at most only one mode is forward wave. The rest of them are backward waves which can have very large effective index. At a critical radius, the waveguide supports degenerate forward- and backward-wave modes with zero group velocity. These waveguides can be used as phase shifters and filters, and as optical buffers to slow down and trap light.

11 pages, 15 figures, RevTex4

References in corpus (7)

• Electromagnetic Wave Propagation in Media with Indefinite Permittivity and Permeability Tensors
• Magnifying superlens in the visible frequency range
• Negative Refraction and Left-handed electromagnetism in Microwave Photonic Crystals
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Cited by in corpus (5)

• Optical Field Enhancement in Nanoscale Slot Waveguides of Hyperbolic Metamaterials
• Plasmonic waveguides cladded by hyperbolic metamaterials
• Nanoscale Metamaterial Optical Waveguides with Ultrahigh Refractive Indices
• Slow light, open cavity formation, and large longitudinal electric field on slab waveguide made of indefinite permittivity materials
• Ultrathin optical switch based on a liquid crystal/silver nanoparticles mixture as a tunable indefinite medium