Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections.
Plasmonic Coaxial Waveguides with Complex Shapes of Cross-Sections.
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DOI：
10.3390/ma4010104
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发表时间：
2010-12-31
期刊：
影响因子：
--
通讯作者：
Karilainen A
中科院分区：
文献类型：
--
作者：
Kozina O;Nefedov I;Melnikov L;Karilainen A
在本文中，我们描述了由贵金属制成并填充玻璃和空气的新型光波导的波导特性。这种波导是同轴电缆，其中心杆的形状不同于传统的同轴电缆。考虑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，并且场局限于金属外部的小区域。我们说明了类偶极源对这些同轴模式的激发。
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.