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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 5 — May. 1, 2008
  • pp: 763–767

Force measurement on microspheres in an optical standing wave

W. Mu, Z. Li, L. Luan, G. C. Spalding, G. Wang, and J. B. Ketterson  »View Author Affiliations

JOSA B, Vol. 25, Issue 5, pp. 763-767 (2008)

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We have measured the optical forces on isolated particles trapped in an optical lattice generated by the interference of two coherent laser beams. Two independent methods are employed here that are based on the equipartition theorem and hydrodynamic drag. The optical force on a particle in an optical lattice depends strongly on the ratio of the particle diameter to the period of the lattice. Based on the observed size dependence, we developed an approach that allows tunable, size-dependent force selection of a subset of particles from an ensemble containing mixed particles.

© 2008 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(140.7010) Lasers and laser optics : Laser trapping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 24, 2007
Manuscript Accepted: December 19, 2007
Published: April 22, 2008

Virtual Issues
Vol. 3, Iss. 6 Virtual Journal for Biomedical Optics

W. Mu, Z. Li, L. Luan, G. C. Spalding, G. Wang, and J. B. Ketterson, "Force measurement on microspheres in an optical standing wave," J. Opt. Soc. Am. B 25, 763-767 (2008)

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