Plasmonic resonance of whispering gallery modes in an Au cylinder

被引：14

作者：

Zhang, Xining ^{[1
]}

Ma, Zhe ^{[1
]}

Yu, Huakang ^{[1
]}

Guo, Xin ^{[1
]}

Ma, Yaoguang ^{[1
]}

Tong, Limin ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Opt Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 05期

基金：

中国国家自然科学基金;

关键词：

SURFACE-PLASMONS; WAVE-GUIDE; EXCITATION; RESONATORS; FIBER; INTERFERENCE; CAVITIES;

D O I：

10.1364/OE.19.003902

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate whispering gallery (WG) resonance of surface plasmon polaritons (SPPs) in a 2-dimensional confined Au cylinder by self interference. Despite the leakage of SPPs along the axis of the cylinder, Q factors of 375 are obtained in a cylinder with diameter of 30 mu m. The coupling-angle-dependence of the WG resonance is also investigated. Our results open opportunities for a new category of plasmonic cavities with 2-dimensional confinement, and this may be applied to a variety of simple and natural metallic micro or nanostructures. (C) 2011 Optical Society of America

引用

页码：3902 / 3907

页数：6

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