Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections

Materials

Olga Kozina²  Igor Nefedov³  Leonid Melnikov¹ 

[1] Saratov State Technical University/Polytechnicheskaya 77, Saratov 410054, Russia; E-Mail:;Saratov Branch of the Institute of Radio-Engineering and Electronics of Russian Academy of Science/Zelyonaya 38, Saratov 410019, Russia; E-Mail:;SMARAD Center of Excellence, Department of Radio Science and Engineering, School of Science and Technology, Aalto University, P.O. Box 13000, Aalto 00076, Finland

关键词: nano-size;    plasmonic waveguides;    coaxial;   

DOI  :  10.3390/ma4010104

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.