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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 25 — Dec. 11, 2006
  • pp: 12310–12315

Counterpropagating beams in nematic liquid crystals

A. I. Strinić, D. M. Jović, M. S. Petrović, D. V. Timotijević, N. B. Aleksić, and M. R. Belić  »View Author Affiliations

Optics Express, Vol. 14, Issue 25, pp. 12310-12315 (2006)

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The behavior of counterpropagating self-trapped optical beam structures in nematic liquid crystals is investigated. A time-dependent model for the beam propagation and the director reorientation in a nematic liquid crystal is numerically treated in three spatial dimensions and time. We find that the stable vector solitons can only exist in a narrow threshold region of control parameters. Bellow this region the beams diffract, above they self-focus into a series of focal spots. Spatiotemporal instabilities are observed as the input intensity, the propagation distance, and the birefringence are increased. We demonstrate undulation, filamentation, and convective dynamical instabilities of counterpropagating beams. Qualitatively similar behavior as of the copropagating beams is observed, except that it happens at lower values of control parameters.

© 2006 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons

ToC Category:
Nonlinear Optics

Original Manuscript: October 13, 2006
Revised Manuscript: November 22, 2006
Manuscript Accepted: November 24, 2006
Published: December 11, 2006

A. I. Strinić, D. M. Jović, M. S. Petrović, D. V. Timotijević, N. B. Aleksić, and M. R. Belić, "Counterpropagating beams in nematic liquid crystals," Opt. Express 14, 12310-12315 (2006)

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