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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 7 — Jul. 27, 2011

Trapping two types of particles using a focused partially coherent elegant Laguerre–Gaussian beam

Chengliang Zhao and Yangjian Cai  »View Author Affiliations

Optics Letters, Vol. 36, Issue 12, pp. 2251-2253 (2011)

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The radiation forces on a Rayleigh dielectric sphere induced by a focused partially coherent elegant Laguerre– Gaussian (ELG) beam are investigated by using the Rayleigh scattering theory. It is found that a focused partially coherent ELG beam with suitable mode orders can be used to trap a Rayleigh particle whose refractive index is larger or smaller than that of the ambient by varying its initial spatial coherence width. Therefore, one can use one optical–trap system to trap two types of particles with different refractive indices.

© 2011 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:
Lasers and Laser Optics

Original Manuscript: April 6, 2011
Manuscript Accepted: May 7, 2011
Published: June 8, 2011

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Chengliang Zhao and Yangjian Cai, "Trapping two types of particles using a focused partially coherent elegant Laguerre–Gaussian beam," Opt. Lett. 36, 2251-2253 (2011)

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