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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 22 — Nov. 15, 2013
  • pp: 4919–4922

Dynamics of microparticles trapped in a perfect vortex beam

Mingzhou Chen, Michael Mazilu, Yoshihiko Arita, Ewan M. Wright, and Kishan Dholakia  »View Author Affiliations


Optics Letters, Vol. 38, Issue 22, pp. 4919-4922 (2013)
http://dx.doi.org/10.1364/OL.38.004919


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Abstract

We analyze microparticle dynamics within a “perfect” vortex beam. In contrast to other vortex fields, for any given integer value of the topological charge, a “perfect” vortex beam has the same annular intensity profile with fixed radius of peak intensity. For a given topological charge, the field possesses a well-defined orbital angular momentum density at each point in space, invariant with respect to azimuthal position. We experimentally create a perfect vortex and correct the field in situ, to trap and set in motion trapped microscopic particles. For a given topological charge, a single trapped particle exhibits the same local angular velocity moving in such a field independent of its azimuthal position. We also investigate particle dynamics in “perfect” vortex beams of fractional topological charge. This light field may be applied for novel studies in optical trapping of particles, atoms, and quantum gases.

© 2013 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(350.4855) Other areas of optics : Optical tweezers or optical manipulation
(050.4865) Diffraction and gratings : Optical vortices
(260.6042) Physical optics : Singular optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 12, 2013
Manuscript Accepted: September 24, 2013
Published: November 15, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Mingzhou Chen, Michael Mazilu, Yoshihiko Arita, Ewan M. Wright, and Kishan Dholakia, "Dynamics of microparticles trapped in a perfect vortex beam," Opt. Lett. 38, 4919-4922 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-22-4919

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