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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 15 — Jul. 28, 2014
  • pp: 18113–18118

Equilibrium orientations of oblate spheroidal particles in single tightly focused Gaussian beams

Yongyin Cao, Wenhe Song, Weiqiang Ding, Fangkui Sun, and TongTong Zhu  »View Author Affiliations


Optics Express, Vol. 22, Issue 15, pp. 18113-18118 (2014)
http://dx.doi.org/10.1364/OE.22.018113


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Abstract

Based on a hybrid discrete dipole approximation (DDA) and T-matrix method, a powerful dynamic simulation model is used to find plausible equilibrium orientation landscapes of micro- and nano-spheroids of varying size and aspect ratio. Orientation landscapes of spheroids are described in both linearly and circularly polarized Gaussian beams. It’s demonstrated that the equilibrium orientations of the prolate and oblate spheroids have different performances. Effect of beam polarization on orientation landscapes is revealed as well as new orientation of oblate spheroids. The torque efficiencies of spheroids at equilibrium are also studied as functions of tilt angle, from which the orientations of the spheroids can be affirmed. This investigation elucidates a solid background in both the function and properties of micro-and nano-spheroidal particles trapped in optical tweezers.

© 2014 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

History
Original Manuscript: May 12, 2014
Revised Manuscript: July 11, 2014
Manuscript Accepted: July 11, 2014
Published: July 18, 2014

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

Citation
Yongyin Cao, Wenhe Song, Weiqiang Ding, Fangkui Sun, and TongTong Zhu, "Equilibrium orientations of oblate spheroidal particles in single tightly focused Gaussian beams," Opt. Express 22, 18113-18118 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-15-18113


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