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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 7 — Jul. 1, 2007
  • pp: 1512–1516

Enhanced two-beam coupling in colloids of ferroelectric nanoparticles in liquid crystals

Oleksandr Buchnev, Andriy Dyadyusha, Malgosia Kaczmarek, Victor Reshetnyak, and Yuriy Reznikov  »View Author Affiliations


JOSA B, Vol. 24, Issue 7, pp. 1512-1516 (2007)
http://dx.doi.org/10.1364/JOSAB.24.001512


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Abstract

We report on the first, to the best of our knowledge, studies of photorefraction in nematic liquid crystal (LC) doped with nanoferroelectric particles. We found the strong enhancement of two-beam coupling in the colloid of ferroelectric nanoparticles in LC. The effect originated from an increased birefringence of the colloid and a stronger LC reorientation torque. Our measurements allowed us to suggest that increased birefringence is caused by the contribution of polarizability anisotropy of the ferroelectric particles. Stronger reorientation torque is caused by the permanent dipole moment of the particles contributing to the dielectric anisotropy of the colloid ε a col . The enhancement of two-beam coupling in LCs by doping with ferroelectric nanoparticles at extremely small concentration shows the strong potential of ferroelectric nanoparticles for improving the optical response of LCs, especially for those materials where a method of chemical synthesis has reached its limit.

© 2007 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals
(190.5330) Nonlinear optics : Photorefractive optics

ToC Category:
Materials

History
Original Manuscript: December 8, 2006
Revised Manuscript: February 15, 2007
Manuscript Accepted: March 1, 2007
Published: June 15, 2007

Citation
Oleksandr Buchnev, Andriy Dyadyusha, Malgosia Kaczmarek, Victor Reshetnyak, and Yuriy Reznikov, "Enhanced two-beam coupling in colloids of ferroelectric nanoparticles in liquid crystals," J. Opt. Soc. Am. B 24, 1512-1516 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-7-1512


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