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
收藏
页码：3902 / 3907
页数：6
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