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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 8 — Apr. 17, 2006
  • pp: 3660–3676

Single-beam trapping of micro-beads in polarized light: Numerical simulations

A.R. Zakharian, P. Polynkin, M. Mansuripur, and J.V. Moloney  »View Author Affiliations

Optics Express, Vol. 14, Issue 8, pp. 3660-3676 (2006)

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Using numerical solutions of Maxwell’s equations in conjunction with the Lorentz law of force, we compute the electromagnetic force distribution in and around a dielectric micro-sphere trapped by a focused laser beam. Dependence of the optical trap’s stiffness on the polarization state of the incident beam is analyzed for particles suspended in air or immersed in water, under conditions similar to those realized in practical optical tweezers. A comparison of the simulation results with available experimental data reveals the merit of one physical model relative to two competing models; the three models arise from different interpretations of the same physical picture.

© 2006 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(140.7010) Lasers and laser optics : Laser trapping
(260.2110) Physical optics : Electromagnetic optics

ToC Category:

Original Manuscript: February 15, 2006
Revised Manuscript: April 7, 2006
Manuscript Accepted: April 10, 2006
Published: April 17, 2006

Virtual Issues
Vol. 1, Iss. 5 Virtual Journal for Biomedical Optics

A. R. Zakharian, P. Polynkin, M. Mansuripur, and J. V. Moloney, "Single-beam trapping of micro-beads in polarized light: Numerical simulations," Opt. Express 14, 3660-3676 (2006)

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  1. M. Mansuripur, "Radiation Pressure and the linear momentum of the electromagnetic field," Opt. Express 12,5375-5401 (2004), http://www.opticsexpress.org/abstract.cfm?id=81636. [CrossRef] [PubMed]
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