Optical whirlpool on an absorbing metallic nanoparticle

被引：90

作者：

Bashevoy, MV ^{[1
]}

Fedotov, VA ^{[1
]}

Zheludev, NI ^{[1
]}

机构：

[1] Univ Southampton, Sch Phys & Astron, EPSRC NanoPhoton Portfolio Ctr, Southampton SO17 1BJ, Hants, England

来源：

OPTICS EXPRESS | 2005年 / 13卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1364/OPEX.13.008372

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The power-flow lines of light interacting with a metallic nanoparticle, in the proximity of its plasmon resonance, form whirlpool-like nanoscale optical vortices. These vortices were independently observed using analytical Mie theory and 3D finite element numerical modelling of the Maxwell equations. Two different types of vortex have been detected. The outward vortex first penetrates the particle near its centerline then, on exiting the particle, the flow-lines turn away from the centerline and enter a spiral trajectory. Outward vortices are seen for the wavelengths shorter then the plasmon resonance. For the wavelengths longer that the plasmon resonance the vortex is inward: the power-flow lines pass around the sides of the particle before turning towards the centerline and entering the particle to begin their spiral trajectory. (c) 2005 Optical Society of America.

引用

页码：8372 / 8379

页数：8

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