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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 23 — Nov. 5, 2012
  • pp: 25876–25883

Electrically controlling spin and orbital angular momentum of a focused light beam in a uniaxial crystal

Wenguo Zhu and Weilong She  »View Author Affiliations

Optics Express, Vol. 20, Issue 23, pp. 25876-25883 (2012)

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We propose a method for controlling the local spin and orbital angular momentum (SAM and OAM) of a focused light beam in a uniaxial crystal by means of Pockels effect. For an input circularly polarized Bessel-Gaussian (BG) beam, both the local SAM and OAM of the output beam are circularly symmetric, their patterns and peak values vary with the applied electric field E0. Let the output beam pass through a quarter-wave plate, the OAM keeps while the SAM varies. The local SAM density is nearly directly proportional to ± sin(2φ), where φ is the azimuthal angle and the signs are dependent on the radius and E0.

© 2012 OSA

OCIS Codes
(230.2090) Optical devices : Electro-optical devices
(260.2160) Physical optics : Energy transfer
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Physical Optics

Original Manuscript: August 28, 2012
Revised Manuscript: October 2, 2012
Manuscript Accepted: October 5, 2012
Published: November 1, 2012

Wenguo Zhu and Weilong She, "Electrically controlling spin and orbital angular momentum of a focused light beam in a uniaxial crystal," Opt. Express 20, 25876-25883 (2012)

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