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Giant Colloidal Diffusivity on Corrugated Optical Vortices

Sang-Hyuk Lee·David G. Grier
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Abstract

A single colloidal sphere circulating around a periodically modulated optical vortex trap can enter a dynamical state in which it intermittently alternates between freely running around the ring-like optical vortex and becoming trapped in local potential energy minima. Velocity fluctuations in this randomly switching state still are characterized by a linear Einstein-like diffusion law, but with an effective diffusion coefficient that is enhanced by more than two orders of magnitude.

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BibTeXRIS

Sang-Hyuk Lee, David G. Grier. 2006-03-21. Giant Colloidal Diffusivity on Corrugated Optical Vortices. https://doi.org/10.1103/physrevlett.96.190601

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