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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 28, Iss. 4 — Apr. 1, 2011
  • pp: 633–640

Optical anisotropy induced by torsion stresses in LiNbO 3 crystals: appearance of an optical vortex

Ihor Skab, Yurij Vasylkiv, Viktoriya Savaryn, and Rostyslav Vlokh  »View Author Affiliations

JOSA A, Vol. 28, Issue 4, pp. 633-640 (2011)

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We report the results of studies of the torsion effect on the optical birefringence in LiNbO 3 crystals. We found that the twisting of those crystals causes a birefringence distribution revealing nontrivial peculiarities. In particular, they have a special point at the center of the cross section perpendicular to the torsion axis where the zero birefringence value occurs. It has also been ascertained that the surface of the spatial birefringence distribution has a conical shape, with the cone axis coinciding with the torsion axis. We revealed that an optical vortex, with a topological charge equal to unity, appears under the torsion of LiNbO 3 crystals. It has been shown that, in contrast to the q plate, both the efficiency of spin-orbital coupling and the orbital momentum of the emergent light can be operated by the torque moment.

© 2011 Optical Society of America

OCIS Codes
(260.1180) Physical optics : Crystal optics
(260.1440) Physical optics : Birefringence
(260.6042) Physical optics : Singular optics
(260.2710) Physical optics : Inhomogeneous optical media

ToC Category:
Physical Optics

Original Manuscript: August 4, 2010
Revised Manuscript: November 4, 2010
Manuscript Accepted: February 2, 2011
Published: March 25, 2011

Ihor Skab, Yurij Vasylkiv, Viktoriya Savaryn, and Rostyslav Vlokh, "Optical anisotropy induced by torsion stresses in LiNbO3 crystals: appearance of an optical vortex," J. Opt. Soc. Am. A 28, 633-640 (2011)

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