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

Buchnev, Oleksandr, Dyadyusha, Andriy, Kaczmarek, Malgosia, Reshetnyak, Victor and Reznikov, Yuriy (2007) Enhanced two-beam coupling in colloids of ferroelectric nanoparticles in liquid crystals Journal of the Optical Society of America B, 24, (7), pp. 1512-1516. (doi:10.1364/JOSAB.24.001512).

Record type: Article

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 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.

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Published date: July 2007

Identifiers

Local EPrints ID: 46987
URI: http://eprints.soton.ac.uk/id/eprint/46987
ISSN: 0740-3224
PURE UUID: 00c76acc-50dd-41b1-ae29-0c3f983b8955

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Date deposited: 18 Jul 2007
Last modified: 17 Jul 2017 15:05

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Contributors

Author: Oleksandr Buchnev
Author: Andriy Dyadyusha
Author: Malgosia Kaczmarek
Author: Victor Reshetnyak
Author: Yuriy Reznikov

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