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Waveguide modes propagating along the circular-cylinder silver nanowire on a silica substrate are calculated and studied using an in-house developed full-vector finite-element imaginary-distance beam propagation method (FV-FE-IDBPM). In particular, leaky-mode characteristics for the mode with field guided mainly at the top air-silver interface and that with field distributed mainly near the silver-substrate...
The surface plasmon polariton modes propagation along a metal thin film with infinite cover region made of uniaxially anisotropic dielectric material and infinite substrate region made of isotropic dielectric material are investigated. The analysis method is a recently established finite-element eigenmode solver. The dispersion characteristics with the optic axis of the uniaxial material rotated in...
The surface plasmon polariton modes existing on a two-interface structure composed of a metal thin film having infinite cover region made of uniaxially anisotropic dielectric material and infinite substrate region made of isotropic dielectric material are analyzed based on a finite-element eigenmode solver. The dispersion characteristics with the optic axis of the uniaxial material rotated in the...
New analytical formulae are proposed to determine leaky surface modes existing in two kinds of planar structures: planar optical waveguides with a uniaxially anisotropic guiding layer and an interface between isotropic material with negative permittivity and uniaxially anisotropic material. Analytical solutions are confirmed by the finite-element eigenmode analysis.
A full-vector finite-difference frequency-domain mode solver is developed for mode analysis of planar optical waveguides containing materials of arbitrary permittivity tensor. The leakage losses are particularly determined for various optic-axis orientations in the anisotropic slab.
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