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Optics Letters

Optics Letters


  • Vol. 28, Iss. 23 — Dec. 1, 2003
  • pp: 2357–2359

Reorientational optical nonlinearity of nematic liquid-crystal cells near the nematic isotropic phase transition temperature

Ming-Shan Tsai, I-Min Jiang, Chi-Yen Huang, and Chia-Chi Shih  »View Author Affiliations

Optics Letters, Vol. 28, Issue 23, pp. 2357-2359 (2003)

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We address the reorientational optical nonlinearity of homogeneously aligned neamtic liquid-crystal (NLC) cells. The propagation of light in NLC cells depend strongly on temperature. At a temperature approaching the clearing point, an undulating beam and multifocal points are observed in the NLC cell by use of a polarizing optical microscope. Using a conoscopic technique, we observed novel consecutive concentric and parabolic patterns projected onto a screen. Optical energy is considered to compete with thermal energy to affect NLC’s orientation and to generate singularities in the steady state. A model of the configuration of the liquid crystal’s orientation is proposed.

© 2003 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in
(260.5950) Physical optics : Self-focusing

Ming-Shan Tsai, I-Min Jiang, Chi-Yen Huang, and Chia-Chi Shih, "Reorientational optical nonlinearity of nematic liquid-crystal cells near the nematic isotropic phase transition temperature," Opt. Lett. 28, 2357-2359 (2003)

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