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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 23316–23322

Direct observation of the transfer of orbital angular momentum to metal particles from a focused circularly polarized Gaussian beam

Yiqiong Zhao, David Shapiro, David Mcgloin, Daniel T. Chiu, and Stefano Marchesini  »View Author Affiliations

Optics Express, Vol. 17, Issue 25, pp. 23316-23322 (2009)

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It is well known that a circularly polarized Gaussian beam carries spin angular momentum, but not orbital angular momentum. This paper demonstrates that focusing a beam carrying spin angular momentum can induce an orbital angular momentum which we used to drive the orbital motion of a micron-sized metal particle that is trapped off the beam axis. The direction of the orbital motion is controlled by the handedness of the circular polarization. The orbiting dynamics of the trapped particle, which acted as an optical micro-detector, were quantitatively measured and found to be in excellent agreement with the theoretical predictions.

© 2009 OSA

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(260.0260) Physical optics : Physical optics
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: September 28, 2009
Revised Manuscript: November 7, 2009
Manuscript Accepted: November 11, 2009
Published: December 4, 2009

Yiqiong Zhao, David Shapiro, David Mcgloin, Daniel T. Chiu, and Stefano Marchesini, "Direct observation of the transfer of orbital angular momentum to metal particles from a focused circularly polarized Gaussian beam," Opt. Express 17, 23316-23322 (2009)

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