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Proceedings Paper

The response of particles with anisotropic shape within an optical landscape and laminar flow
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Paper Abstract

We have developed an order of magnitude model for the the complete motion - translation and rotation - of spheroidal microparticles under the influence of intense optical landscapes and laminar flow using force and torque balances within the system. Our fields of interest are periodic interference profiles, sometimes termed optical landscapes, that can be formed by simple holography. When given an arbitrary landscape, our model predicts that, in general, spheroidal particles become trapped at a lower potential threshold than do spherical particles of an equivalent volume. In addition, we show that optical landscapes exhibit exponential trapping selectivity based on particle size and shape, effectively adding a further dimension of control over which to trap, influence, and sort particles within the same flow.

Paper Details

Date Published: 11 September 2006
PDF: 10 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 632614 (11 September 2006); doi: 10.1117/12.679486
Show Author Affiliations
Brandon L. Conover, North Carolina State Univ. (United States)
Michael J. Escuti, North Carolina State Univ. (United States)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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