28 May 2004 Rectifying transport of a mixture of Brownian particles on an asymmetric periodic optical potential
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Abstract
Optical micro-manipulation has seen a resurgence of interest in recent years, which has been due in part to new application areas and the use of tailored forms of light beam. In this paper, experimental observations of fluctuation-driven transport of silica microspheres within a two-dimensional optical potential of circular symmetry are observed. The potential is created by a Bessel light beam. The optical field is tailored to break the symmetry and create a static tilted periodic (washboard) potential. Transitions between locked and running modes may be observed. The running mode manifests itself by rapid accumulation of particles at the beam centre. We discuss what happens with mixtures of particles in such an optical potential.
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Graham Milne, David McGloin, Svetlana A. Tatarkova, Wilson Sibbett, Kishan Dholakia, "Rectifying transport of a mixture of Brownian particles on an asymmetric periodic optical potential", Proc. SPIE 5330, Complex Dynamics, Fluctuations, Chaos, and Fractals in Biomedical Photonics, (28 May 2004); doi: 10.1117/12.533746; https://doi.org/10.1117/12.533746
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