Circling particles and drafting in optical vortices

Details Circling particles and drafting in optical vortices Circling particles and drafting in optical vortices

2004-05-04

arxiv.org/abs/cond-mat/0405051v1

J. Phys.: Condens. Matter 16, S4085 (2004)

Physics

Condensed Matter

Soft Condensed Matter

(i) To be published in J. Phys.: Condens. Matter. (ii) Published version shall contain movies corresponding to figs. 5 and 8;

Scientific paper

10.1088/0953-8984/16/38/023

Particles suspended in a viscous fluid circle in optical vortices generated by holographic optical-tweezer techniques [Curtis J E and Grier D G 2003 Phys. Rev. Lett. 90 133901]. We model this system and show that hydrodynamic interactions between the circling particles determine their collective motion. We perform a linear-stability analysis to investigate the stability of regular particle clusters and illustrate the limit cycle to which the unstable modes converge. We clarify that drafting of particle doublets is essential for the understanding of the limit cycle.

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