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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 19, Iss. 6 — Jun. 1, 2002
  • pp: 1342–1348

Thermal-lens model compared with the Sheik-Bahae formalism in interpreting Z-scan experiments on lyotropic liquid crystals

Fabio Luiz Sant’Anna Cuppo, Antônio Martins Figueiredo Neto, Sergio Leonardo Gómez, and Peter Palffy-Muhoray  »View Author Affiliations


JOSA B, Vol. 19, Issue 6, pp. 1342-1348 (2002)
http://dx.doi.org/10.1364/JOSAB.19.001342


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Abstract

We carried out Z-scan measurements on lyotropic liquid crystals and on lyotropic liquid crystals doped with ferrofluid. In these experiments, the sample is translated through the focal region of a focused Gaussian laser beam. The dependence of the far-field intensity on sample position due to intensity-dependent optical nonlinearities has been analyzed on the basis of the thermal-lens model of Gordon et al. and the Gaussian decomposition analysis of Sheik-Bahae et al. The thermal-lens model is nonlocal in space and time, whereas the Gaussian decomposition is predicated on a strictly local response. We compare the goodness of fit of the predictions of these models to experimental data, and we discuss limitations of these models in describing Z-scan experiments on systems with nonlocal response.

© 2002 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter

Citation
Fabio Luiz Sant’Anna Cuppo, Antônio Martins Figueiredo Neto, Sergio Leonardo Gómez, and Peter Palffy-Muhoray, "Thermal-lens model compared with the Sheik-Bahae formalism in interpreting Z-scan experiments on lyotropic liquid crystals," J. Opt. Soc. Am. B 19, 1342-1348 (2002)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-19-6-1342

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