Giant colloidal diffusivity on corrugated optical vortices

Sang Hyuk Lee; David G. Grier

doi:10.1103/PhysRevLett.96.190601

Giant colloidal diffusivity on corrugated optical vortices

Sang Hyuk Lee, David G. Grier

Research output: Contribution to journal › Article › peer-review

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 ringlike 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 2 orders of magnitude.

Original language	English (US)
Article number	190601
Journal	Physical Review Letters
Volume	96
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.96.190601
State	Published - 2006

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.96.190601

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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 ringlike 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 2 orders of magnitude.",

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AB - 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 ringlike 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 2 orders of magnitude.

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Giant colloidal diffusivity on corrugated optical vortices

Abstract

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