Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections

In this paper, we describe waveguide properties of new optical waveguides made of noble metals and filled with glass and air. Such waveguides are coaxial cables and differ from a conventional coaxial in the shape of their central rods. Coaxial waveguide with annular and elliptic central rods are con...

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Bibliographic Details
Published in:Materials 2010-12, Vol.4 (1), p.104-116
Main Authors: Kozina, Olga, Nefedov, Igor, Melnikov, Leonid, Karilainen, Antti
Format: Article
Language:English
Subjects:
Light
Localization
Metals
Propagation
Silver
Velocity
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Summary:In this paper, we describe waveguide properties of new optical waveguides made of noble metals and filled with glass and air. Such waveguides are coaxial cables and differ from a conventional coaxial in the shape of their central rods. Coaxial waveguide with annular and elliptic central rods are considered. Numerical simulations demonstrate that these waveguides, having nanosize cross-section, support propagation of few comparatively low-loss modes, having phase velocity close to the speed of light and the fields localized in a small area outside a metal. We illustrate excitation of these coaxial modes by dipole-like sources.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma4010104