Giant colloidal diffusivity on corrugated optical vortices

Sang Hyuk Lee, David G. Grier

    Research output: Contribution to journalArticlepeer-review


    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 languageEnglish (US)
    Article number190601
    JournalPhysical Review Letters
    Issue number19
    StatePublished - 2006

    ASJC Scopus subject areas

    • General Physics and Astronomy


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