Tunability of Subradiant Dipolar and Fano-Type Plasmon Resonances in Metallic Ring/Disk Cavities: Implications for Nanoscale Optical Sensing

被引：459

作者：

Hao, Feng ^{[1
]}

Nordlander, Peter ^{[1
]}

Sonnefraud, Yannick ^{[2
]}

Van Dorpe, Pol ^{[3
]}

Maier, Stefan A. ^{[2
]}

机构：

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

[2] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Expt Solid State Grp, London SW7 2AZ, England

[3] IMEC, B-3001 Louvain, Belgium

来源：

ACS NANO | 2009年 / 3卷 / 03期

基金：

美国国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

plasmonics; optical nanocavities; surface enhanced spectroscopy; Fano resonances; ENHANCED RAMAN-SCATTERING; SYMMETRY-BREAKING; NANOPARTICLES; SILVER; NANOSTRUCTURES; METAMATERIALS; HYBRIDIZATION; LIGHT;

D O I：

10.1021/nn900012r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Plasmonic nanocavities consisting of the concentric arrangement of a disk and a ring sustain both subradiant and superradiant dipolar plasmon modes with large associated field enhancements and high refractive index sensitivities. In structures with broken symmetry, additionally a highly tunable Fano interference feature appears, which can be explained with a simple analytical harmonic oscillator model. The spectral tunability of these resonances from the visible to the mid-infrared is investigated, highlighting a potential for applications in surface enhanced spectroscopies.

引用

页码：643 / 652

页数：10

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