Optical guided waves at graded metal-dielectric interfaces

被引：1
|
作者：
Kruger, Brett A. [1 ]
Poon, Joyce K. S.
机构：
[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
来源：
OPTICS LETTERS | 2011年 / 36卷 / 11期
关键词：
ELECTROMAGNETIC ENHANCEMENT; SURFACE-PLASMONS; METAMATERIALS; TRANSITION; DISPERSION; ROUGHNESS;
D O I：
10.1364/OL.36.002155
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Waveguides at interfaces with a linearly graded permittivity between a metal and a dielectric are studied. Analytic expressions for the dispersion relations, modes, losses, and cutoff wavelengths are derived and agree well with simulations. The gradation results in anomalous dispersion, a reduction in the energy velocity, and increased field confinement in the metal-dielectric transition region. These effects lead to increased propagation losses, which are sensitive to the spatial extent of the interface gradation. (C) 2011 Optical Society of America
引用
收藏
页码：2155 / 2157
页数：3
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