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

页码：2155 / 2157

页数：3

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