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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 31, Iss. 8 — Aug. 1, 2014
  • pp: 1710–1715

Intrinsic optical torque of cylindrical vector beams on Rayleigh absorptive spherical particles

Manman Li, Shaohui Yan, Baoli Yao, Ming Lei, Yanlong Yang, Junwei Min, and Dan Dan  »View Author Affiliations

JOSA A, Vol. 31, Issue 8, pp. 1710-1715 (2014)

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The intrinsic optical torque of a focused cylindrical vector beam on a Rayleigh absorptive spherical particle is calculated via the corrected dipole approximation. Numerical results show that, for the radially polarized input field, the torque is distributed in the focal plane strictly along the azimuthal direction anywhere except at the focus. This shows a completely different property from what is observed in the focusing of a circularly polarized beam, where a strong axial torque component arises. For other cylindrically polarized input fields, the torque tends to align itself along the radial direction, as the polarization angle (the angle between the electric vector and the radial direction) changes from 0° to 90°. When limited to considering the torque at the equilibrium position, we find that only for those input fields with polarization angles larger than 50°, the particle experiences a nonzero torque at its equilibrium position. This is verified by showing quantitatively the effects of the polarization angle on the magnitude and orientation of the torque at the equilibrium position.

© 2014 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(260.2110) Physical optics : Electromagnetic optics
(290.0290) Scattering : Scattering

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 30, 2014
Revised Manuscript: June 3, 2014
Manuscript Accepted: June 6, 2014
Published: July 3, 2014

Virtual Issues
Vol. 9, Iss. 10 Virtual Journal for Biomedical Optics

Manman Li, Shaohui Yan, Baoli Yao, Ming Lei, Yanlong Yang, Junwei Min, and Dan Dan, "Intrinsic optical torque of cylindrical vector beams on Rayleigh absorptive spherical particles," J. Opt. Soc. Am. A 31, 1710-1715 (2014)

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