具有复杂横截面形状的等离子体同轴波导。

Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections.

作者信息

Kozina Olga, Nefedov Igor, Melnikov Leonid, Karilainen Antti

机构信息

Saratov Branch of the Institute of Radio-Engineering and Electronics of Russian Academy of Science/Zelyonaya 38, Saratov 410019, Russia.

SMARAD Center of Excellence, Department of Radio Science and Engineering, School of Science and Technology, Aalto University, P.O. Box 13000, Aalto 00076, Finland.

出版信息

Materials (Basel). 2010 Dec 31;4(1):104-116. doi: 10.3390/ma4010104.

DOI:10.3390/ma4010104

PMID:28879979

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5448476/

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.

摘要

在本文中，我们描述了由贵金属制成并填充有玻璃和空气的新型光波导的波导特性。此类光波导为同轴电缆，其中心杆形状与传统同轴电缆不同。本文考虑了具有环形和椭圆形中心杆的同轴波导。数值模拟表明，这些具有纳米尺寸横截面的波导支持少数相对低损耗模式的传播，其相速度接近光速，且场局限于金属外部的小区域内。我们展示了由偶极子状源对这些同轴模式的激发。