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Type: Artigo de periódico
Title: Temperature Dependence Of The Refractive Index Near The Reentrant-isotropic--calamitic-nematic Phase Transition.
Author: Pereira, J R
Mansanares, A M
Palangana, A J
Baesso, M L
Abstract: The laser-induced nonlinear optical response of a lyotropic liquid crystal system in the reentrant-isotropic and calamitic-nematic phases is investigated by the use of the thermal lens technique. The occurrence of an inversion in the temperature coefficient of the ordinary refractive index, dn(radially)/dT, near the reentrant-isotropic-calamitic-nematic phase transition, is discussed. This effect is attributed to the behavior of the electronic polarizability due to the change in micelle shape near the isotropic-nematic transition, and correlated with the results obtained near the nematic-isotropic transition, previously reported.
Rights: aberto
Identifier DOI: 
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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