Enhanced optical forces between coupled resonant metal nanoparticles

被引：94

作者：

Zelenina, Anna S.

Quidant, Romain

Nieto-Vesperinas, Manuel

机构：

[1] ICFO Inst Ciencies Foton, Barcelona 08860, Spain

[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

OPTICS LETTERS | 2007年 / 32卷 / 09期

关键词：

D O I：

10.1364/OL.32.001156

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate numerically the optical forces between noble metal naraparticles sustaining localized surface plasmon resonances. Our results first point out enhanced binding optical forces compared with dielectric nanaparticles and nonresonant metallic nanoparticles. We also show that under suitable illumination conditions, short-range forces tend to make the nanoparticles cluster, leading to intense and localized hot spots in the interstices. This effect corroborates recent experimental observations of an enhanced Raman signal in trapped metal sphere ensembles. (c) 2007 Optical Society of America.

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页码：1156 / 1158

页数：3

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