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Proceedings Paper

Measurement of optical binding force between two colloidal particles
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Paper Abstract

Optical binding has been proposed to be responsible for the cluster formation of micron size dielectric spheres in coherent light fields. However, a direct measurement of the forces involved in binding is missing. We report an experimental study of optical binding forces between two optically trapped dielectric spheres. Results for optical forces are presented as a function of three parameters: inter particle separation, particle size, and respective polarizations. A comprehensive calculation based on the generalized Mie scattering theory for the experiment has also been conducted. This paper will present a comparison between experimental and theoretical results.

Paper Details

Date Published: 20 August 2009
PDF: 10 pages
Proc. SPIE 7400, Optical Trapping and Optical Micromanipulation VI, 74001E (20 August 2009); doi: 10.1117/12.826398
Show Author Affiliations
Ming-Tzo Wei, Lehigh Univ. (United States)
Jack Ng, The Hong Kong Univ. of Science and Technology (Hong Kong, China)
C. T. Chan, The Hong Kong Univ. of Science and Technology (Hong Kong, China)
H. Daniel Ou-Yang, Lehigh Univ. (United States)

Published in SPIE Proceedings Vol. 7400:
Optical Trapping and Optical Micromanipulation VI
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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