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Molecular Crystals and Liquid Crystals Volume 657, 2017 - Issue 1: Optics of Liquid Crystals 2017 (OLC 2017)
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Original Articles

Effects of an external electric field on the nonlinear optical absorption of smectic liquid crystals containing gold nanorods

R. S. SilvaInstituto de Física, Universidade Federal de Alagoas Maceió-AL, Brazil
,
L. OmenaInstituto de Física, Universidade Federal de Alagoas Maceió-AL, Brazil
,
A. M. NunesInstituto de Química e Biotecnologia, Universidade Federal de Alagoas Maceió-AL, Brazil
,
M. G. A. da SilvaInstituto de Química e Biotecnologia, Universidade Federal de Alagoas Maceió-AL, Brazil
,
M. R. MeneghettiInstituto de Química e Biotecnologia, Universidade Federal de Alagoas Maceió-AL, Brazil
&
I. N. de OliveiraInstituto de Física, Universidade Federal de Alagoas Maceió-AL, BrazilCorrespondence[email protected]
Pages 21-26 | Published online: 18 Jan 2018
 
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ABSTRACT

The present manuscript is devoted to the study of the nonlinear optical absorption of a smectic liquid crystal doped with gold nanorods in the presence of an external electric field. By using Z-scan technique in the configuration of fully open aperture and normal incidence, we analyze the changes in the absorption coefficient of a homeotropic sample upon laser exposure. Our results reveal that the electric field may suppress the nonlinear absorption of the samples well bellow to smectic-A-nematic transition temperature. The effects of the external electric field on the interplay between smectic order and plasmon resonance are analyzed.

Funding

This study was partially supported by Instituto Nacional de Ciência e Tecnologia de Fluidos Complexos (INCT-FCx), CAPES, CNPq/MCT, FAPEAL and FINEP (Brazilian Research Agencies).

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