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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 13 — Jul. 1, 2014
  • pp: 3728–3731

Vortex generation and inhomogeneous Faraday rotation of a nonparaxial Gaussian beam in isotropic magneto-optic crystals

Xiancong Lu and Lixiang Chen  »View Author Affiliations

Optics Letters, Vol. 39, Issue 13, pp. 3728-3731 (2014)

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We study the propagation of a nonparaxial Gaussian beam in the isotropic Bi4Ge3O12 crystal under an external magnetic field. The analytical solutions in the paraxial limit are derived, which show that a vortex with topological charge m=2 (m=1) generates in the E (Ez) component. Numerical calculations in the nonparaxial regime confirm that, with the assistance of an external magnetic field, the spin-to-orbital angular momentum coupling effect can occur even in the isotropic crystal. We also study the Faraday rotation of the nonparaxial Gaussian beam. At the center of the transverse plane, the rotation of the plane of polarization is linearly proportional to the magnetic field. However, the rotation is not uniform on the whole transverse plane, manifesting the nonparaxial effect.

© 2014 Optical Society of America

OCIS Codes
(230.2240) Optical devices : Faraday effect
(260.1180) Physical optics : Crystal optics
(050.4865) Diffraction and gratings : Optical vortices
(070.7345) Fourier optics and signal processing : Wave propagation

ToC Category:
Optical Devices

Original Manuscript: March 26, 2014
Revised Manuscript: May 13, 2014
Manuscript Accepted: May 16, 2014
Published: June 17, 2014

Xiancong Lu and Lixiang Chen, "Vortex generation and inhomogeneous Faraday rotation of a nonparaxial Gaussian beam in isotropic magneto-optic crystals," Opt. Lett. 39, 3728-3731 (2014)

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