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High Optical Nonlinearity of Nematic Liquid Crystals Doped with Gold Nanoparticles

Journal of Physical Chemistry C, 2012, 116 (23), 12934-12939

Abstract

Tetraoctylammonium bromide (TOAB)-coated gold nanoparticles dispersed in nematic liquid crystals lead to an enhancement of the nonlinear index coefficient, (n₂). A small amount of particles is sufficient to increase n₂ and two-beam coupling gain by more than an order of magnitude while maintaining high optical quality and the ability of the suspensions to withstand strong applied electric fields. However, TOAB plays a crucial role in increasing the pretilt angle and reducing the anchoring strength, which leads to a stronger modulation of both the reorientation and the refractive index of liquid crystal suspensions.

For citations:
Podoliak, N.; Bartczak, D.; Buchnev, O.; Kanaras, A. G.; Kaczmarek, M.
High Optical Nonlinearity of Nematic Liquid Crystals Doped with Gold Nanoparticles
J. Phys. Chem. C, 2012, 116 (23), 12934-12939
DOI: 10.1021/jp302558c

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