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Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles – an experimental and numerical investigation

Kurochkin, O.; Murugesan, Y. K.; Bennett, T. P.; D'Alessandro, G.; Reznikov, Y.; Tang, B. J.; Mehl, G. H.; Kaczmarek, M.

Authors

O. Kurochkin

Y. K. Murugesan

T. P. Bennett

G. D'Alessandro

Y. Reznikov

B. J. Tang

M. Kaczmarek



Abstract

In this work the mechanisms leading to the enhancement of optical nonlinearity of nematic liquid crystalline material through localized heating by doping the liquid crystals (LCs) with gold nanoparticles (GNPs) are investigated. We present some experimental and theoretical results on the effect of voltage and nanoparticle concentration on the nonlinear response of GNP-LC suspensions. The optical nonlinearity of these systems is characterized by diffraction measurements and the second order nonlinear refractive index, n 2 , is used to compare systems with different configurations and operating conditions. A theoretical model based on heat diffusion that takes into account the intensity and finite size of the incident beam, the nanoparticle concentration dependent absorbance of GNP doped LC systems and the presence of bounding substrates is developed and validated. We use the model to discuss the possibilities of further enhancing the optical nonlinearity.

Journal Article Type Article
Publication Date Mar 1, 2016
Journal Physical chemistry chemical physics
Print ISSN 1463-9076
Electronic ISSN 1463-9084
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 18
Issue 16
Pages 11503-11512
APA6 Citation Kurochkin, O., Murugesan, Y. K., Bennett, T. P., D'Alessandro, G., Reznikov, Y., Tang, B. J., …Kaczmarek, M. (2016). Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles – an experimental and numerical investigation. Physical chemistry chemical physics : PCCP, 18(16), 11503-11512. https://doi.org/10.1039/c6cp00116e
DOI https://doi.org/10.1039/c6cp00116e
Keywords Nematic mesophase
Publisher URL http://pubs.rsc.org/en/content/articlelanding/2016/cp/c6cp00116e#!divAbstract
Additional Information : This document is Similarity Check deposited; : The PCCP Owner Societies have an exclusive publication licence for this journal; : Single-blind; : Received 12 January 2016; Accepted 25 February 2016; Accepted Manuscript published 1 March 2016; Advance Article published 11 April 2016; Version of Record published 20 April 2016

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