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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 4 — Feb. 21, 2005
  • pp: 1260–1265

Optical trapping force with annular and doughnut laser beams based on vectorial diffraction

Djenan Ganic, Xiaosong Gan, and Min Gu  »View Author Affiliations


Optics Express, Vol. 13, Issue 4, pp. 1260-1265 (2005)
http://dx.doi.org/10.1364/OPEX.13.001260


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Abstract

The inadequacy of the optical trapping model based on ray optics in the case of describing the optical trapping performance of annular and doughnut laser beams is discussed. The inadequacy originates from neglecting the complex focused field distributions of such beams, such as polarization and phase, and thus leads to erroneous predictions of trapping force. Instead, the optical trapping model based on the vectorial diffraction theory, which considers the exact field distributions of a beam in the focal region, needs to be employed for the determination of the trapping force exerted on small particles. The theoretical predictions of such a trapping model agree with the experimentally measured results.

© 2005 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(140.7010) Lasers and laser optics : Laser trapping
(260.1960) Physical optics : Diffraction theory

ToC Category:
Research Papers

History
Original Manuscript: January 12, 2005
Revised Manuscript: January 12, 2005
Published: February 21, 2005

Citation
Djenan Ganic, Xiaosong Gan, and Min Gu, "Optical trapping force with annular and doughnut laser beams based on vectorial diffraction," Opt. Express 13, 1260-1265 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-4-1260


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References

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