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Optical whirlpool on an absorbing metallic nanoparticle

Optical whirlpool on an absorbing metallic nanoparticle
Optical whirlpool on an absorbing metallic nanoparticle
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.
nanoparticle optical vortex plasmon resonance
1094-4087
8372-8379
Bashevoy, M.V.
b9c00e78-fd59-4243-a369-f29dd08061fd
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Bashevoy, M.V.
b9c00e78-fd59-4243-a369-f29dd08061fd
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Bashevoy, M.V., Fedotov, V.A. and Zheludev, N.I. (2005) Optical whirlpool on an absorbing metallic nanoparticle. Optics Express, 13 (21), 8372-8379. (doi:10.1364/OPEX.13.008372).

Record type: Article

Abstract

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.

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Published date: 17 October 2005
Keywords: nanoparticle optical vortex plasmon resonance

Identifiers

Local EPrints ID: 28680
URI: https://eprints.soton.ac.uk/id/eprint/28680
ISSN: 1094-4087
PURE UUID: cfd8de55-6342-47e1-abe8-59eaa5a8a17d
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 03 May 2006
Last modified: 26 Nov 2019 02:03

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Contributors

Author: M.V. Bashevoy
Author: V.A. Fedotov
Author: N.I. Zheludev ORCID iD

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