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High optical nonlinearity of nematic liquid crystals doped with gold nanoparticles

High optical nonlinearity of nematic liquid crystals doped with gold nanoparticles
High optical nonlinearity of nematic liquid crystals doped with gold nanoparticles
Tetraoctylammonium bromide (TOAB)-coated gold nano-particles 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.
1932-7447
12934-12939
Podoliak, Nina
0908b951-00a7-48a5-bc82-631640910b9c
Bartczak, Dorota
4d706d11-ee17-4e30-9ba8-1d4b3d878f71
Buchnev, O.
60cdb0d2-3388-47be-a066-61b3b396f69d
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Podoliak, Nina
0908b951-00a7-48a5-bc82-631640910b9c
Bartczak, Dorota
4d706d11-ee17-4e30-9ba8-1d4b3d878f71
Buchnev, O.
60cdb0d2-3388-47be-a066-61b3b396f69d
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327

Podoliak, Nina, Bartczak, Dorota, Buchnev, O., Kanaras, Antonios G. and Kaczmarek, M. (2012) High optical nonlinearity of nematic liquid crystals doped with gold nanoparticles. The Journal of Physical Chemistry C, 116 (23), 12934-12939. (doi:10.1021/jp302558c).

Record type: Article

Abstract

Tetraoctylammonium bromide (TOAB)-coated gold nano-particles 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.

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More information

Published date: June 2012
Organisations: Optoelectronics Research Centre, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 358659
URI: https://eprints.soton.ac.uk/id/eprint/358659
ISSN: 1932-7447
PURE UUID: bc88bfd1-4972-4205-870e-0716bedcf314
ORCID for Nina Podoliak: ORCID iD orcid.org/0000-0002-3146-0355
ORCID for Antonios G. Kanaras: ORCID iD orcid.org/0000-0002-9847-6706

Catalogue record

Date deposited: 10 Oct 2013 16:28
Last modified: 09 Jan 2019 01:33

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