Optical whirlpool near absorbing metallic nanoparticle

Details Optical whirlpool near absorbing metallic nanoparticle Optical whirlpool near absorbing metallic nanoparticle

2005-05-19

arxiv.org/abs/cond-mat/0505484v2

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1364/OPEX.13.008372

The power-flow lines of light interacting with a metallic nanoparticle, in the proximity of its plasmon resonance, form whirlpool-like nanoscale optical vortices. 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 vortexes 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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