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Materials 2011, 4(1), 104-116; doi:10.3390/ma4010104
Article

Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections

1
,
2,* , 3
 and
2
1 Saratov Branch of the Institute of Radio-Engineering and Electronics of Russian Academy of Science/Zelyonaya 38, Saratov 410019, Russia 2 SMARAD Center of Excellence, Department of Radio Science and Engineering, School of Science and Technology, Aalto University, P.O. Box 13000, Aalto 00076, Finland 3 Saratov State Technical University/Polytechnicheskaya 77, Saratov 410054, Russia
* Author to whom correspondence should be addressed.
Received: 14 December 2010 / Accepted: 29 December 2010 / Published: 31 December 2010
(This article belongs to the Special Issue Next Wave of Metamaterials)
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Abstract

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.
Keywords: nano-size; plasmonic waveguides; coaxial nano-size; plasmonic waveguides; coaxial
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Kozina, O.; Nefedov, I.; Melnikov, L.; Karilainen, A. Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections. Materials 2011, 4, 104-116.

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