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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 19 — Sep. 15, 2008
  • pp: 15191–15197

Strong tangential force within a small trapping volume under near-field Laguerre-Gaussian beam illumination

Baohua Jia, Xiaosong Gan, and Min Gu  »View Author Affiliations

Optics Express, Vol. 16, Issue 19, pp. 15191-15197 (2008)

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Near-field rotation of a trapped particle under focused evanescent Laguerre-Gaussian beam illumination is theoretically investigated by mapping the two-dimensional transverse trapping efficiency exerting on the particle. It is revealed that the severe focal field deformation associated with a focused evanescent Laguerre-Gaussian beam causes a significant impact on the transverse trapping performance of the microparticle. Compared with the far-field trapping force, strong tangential force components have been observed in the transverse efficiency mapping, which potentially lead to rotational motions to the particle within a small trapping volume in the optical near-field.

© 2008 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:
Optical Trapping and Manipulation

Original Manuscript: August 6, 2008
Revised Manuscript: September 8, 2008
Manuscript Accepted: September 9, 2008
Published: September 11, 2008

Virtual Issues
Vol. 3, Iss. 11 Virtual Journal for Biomedical Optics

Baohua Jia, Xiaosong Gan, and Min Gu, "Strong tangential force within a small trapping volume under near-field Laguerre-Gaussian beam illumination," Opt. Express 16, 15191-15197 (2008)

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