Experimental Realization of Subradiant, Superradiant, and Fano Resonances in Ring/Disk Plasmonic Nanocavities

被引：376

作者：

Sonnefraud, Yannick ^{[2
]}

Verellen, Niels ^{[1
,3
,4
]}

Sobhani, Heidar ^{[5
]}

Vandenbosch, Guy A. E. ^{[4
]}

Moshchalkov, Victor V. ^{[3
]}

Van Dorpe, Pol ^{[1
]}

Nordlander, Peter ^{[5
]}

Maier, Stefan A. ^{[2
]}

机构：

[1] IMEC, B-3001 Leuven, Belgium

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

[3] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, Nanoscale Superconduct & Magnetism & Pulsed Field, B-3001 Leuven, Belgium

[4] Katholieke Univ Leuven, ESAT TELEMIC, B-3001 Louvain, Belgium

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

来源：

ACS NANO | 2010年 / 4卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

plasmonics; optical nanocavities; Fano resonance; subradiance; superradiance; SYMMETRY-BREAKING; SILVER; SPECTROSCOPY; LIGHT; HYBRIDIZATION; POLARIZATION; ENHANCEMENT; SERS;

D O I：

10.1021/nn901580r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Subradiant and superradiant plasmon modes in concentric ring/disk nanocavities are experimentally observed. The subradiance is obtained through an overall reduction of the total dipole moment of the hybridized mode due to antisymmetric coupling of the dipole moments of the parent plasmons. Multiple Fano resonances appear within the superradiant continuum when structural symmetry is broken via a nanometric displacement of the disk, due to coupling with higher order ring modes. Both subradiant modes and Fano resonances exhibit substantial reductions in line width compared to the parent plasmon resonances, opening up possibilities in optical and near IR sensing via plasmon line shape design.

引用

页码：1664 / 1670

页数：7

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