Shedding light on dark plasmons in gold nanorings

被引：202

作者：

Hao, Feng ^{[1
,2
]}

Larsson, Elin M. ^{[3
]}

Ali, Tamer A. ^{[2
,4
]}

Sutherland, Duncan S. ^{[5
]}

Nordlander, Peter ^{[1
,2
,4
]}

机构：

[1] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA

[2] Rice Univ, Lab Nanophoton, Houston, TX 77005 USA

[3] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

[4] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA

[5] Aarhus Univ, iNANO Ctr, DK-8000 Aarhus, Denmark

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 458卷 / 4-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2008.04.126

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present an experimental and theoretical analysis of the optical properties of gold nanorings of different sizes and cross-sections. We show that for light polarized parallel to the ring, the optical spectrum can depend sensitively on the angle of incidence. For normal incidence, the spectrum is characterized by two dipolar ring resonances. As the angle of incidence becomes more oblique, several previously dark multipolar ring resonances appear in the spectra. We show that the appearance of the multipolar resonances is a consequence of retardation and can be understood in simple general terms. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：262 / 266

页数：5

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