Transition from Isolated to Collective Modes in Plasmonic Oligomers

被引：521

作者：

Hentschel, Mario ^{[3
,4
,5
]}

Saliba, Michael ^{[3
,4
,5
]}

Vogelgesang, Ralf ^{[5
]}

Giessen, Harald ^{[3
,4
]}

Alivisatos, A. Paul ^{[1
,2
]}

Liu, Na ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Stuttgart, Inst Phys 4, D-70569 Stuttgart, Germany

[4] Univ Stuttgart, Res Ctr Scope, D-70569 Stuttgart, Germany

[5] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

NANO LETTERS | 2010年 / 10卷 / 07期

基金：

美国能源部;

关键词：

Plasmons; coupling; Fano resonances; dark mode; oligomer; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; FANO RESONANCES; GOLD; HYBRIDIZATION; METAMATERIAL; ANALOG;

D O I：

10.1021/nl101938p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate the transition from isolated to collective optical modes in plasmonic oligomers. Specifically, we investigate the resonant behavior of planar plasmonic hexamers and heptamers with gradually decreasing the interparticle gap separation A pronounced Fano resonance is observed in the plasmonic heptamer for separations smaller than 60 nm The spectral characteristics change drastically upon removal of the central nanoparticle Our work paves the road toward complex hierarchical plasmonic oligmers with tailored optical properties

引用

页码：2721 / 2726

页数：6

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