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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 18 — Jun. 20, 2014
  • pp: 3976–3981

Optical trapping Rayleigh particles by using focused multi-Gaussian Schell-model beams

Xiayin Liu and Daomu Zhao  »View Author Affiliations


Applied Optics, Vol. 53, Issue 18, pp. 3976-3981 (2014)
http://dx.doi.org/10.1364/AO.53.003976


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Abstract

We numerically investigate the radiation forces of multi-Gaussian Schell-model (MGSM) beams, in which the degree of coherence is modeled by the multi-Gaussian function, exerted on the Rayleigh dielectric sphere. By simulation of the forces calculation it is found that the steepness of the edge of the intensity profile (i.e., the summation index M) and the initial coherence width of the MGSM beams play important roles in the trapping range and stability. We can increase the trapping range at the focal plane by increasing the value of M or decreasing the initial coherence of the MGSM beams. It is also found that the trapping stability becomes lower due to the increase of the value of M or the decrease of coherence. Furthermore, the trapping stability under different conditions is explicitly analyzed. The results presented here are helpful for some possible applications.

© 2014 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(140.7010) Lasers and laser optics : Laser trapping
(290.5870) Scattering : Scattering, Rayleigh
(350.5500) Other areas of optics : Propagation

ToC Category:
Scattering

History
Original Manuscript: February 25, 2014
Revised Manuscript: May 12, 2014
Manuscript Accepted: May 16, 2014
Published: June 17, 2014

Virtual Issues
Vol. 9, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Xiayin Liu and Daomu Zhao, "Optical trapping Rayleigh particles by using focused multi-Gaussian Schell-model beams," Appl. Opt. 53, 3976-3981 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-18-3976


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