Tricritical-like behavior of the nonlinear optical refraction at the nematic-isotropic transition in the E7 thermotropic liquid crystal
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
05/11/2013
05/11/2013
2012
|
| Resumo |
We use Z-scan technique to investigate the nonlinear optical response of the thermotropic liquid crystal E7 in the neighborhood of the nematic-isotropic phase transition. The analysis of the data for the nonlinear optical birefringence is compatible with an effective critical exponent of the order parameter, beta = 0.28 +/- 0.03, which is close to the classical value, beta = 0.25, for a tricritical point. The nonlinear optical absorption in the nematic range depends on the geometrical configuration of the nematic director with respect to the polarization beam, and vanishes in the isotropic phase. CAPES CAPES CNPq CNPq FAPESP FAPESP Fundacao Araucaria Fundacao Araucaria |
| Identificador |
EUROPEAN PHYSICAL JOURNAL E, NEW YORK, v. 35, n. 1, supl. 1, Part 3, pp. 546-552, JAN, 2012 1292-8941 http://www.producao.usp.br/handle/BDPI/41029 10.1140/epje/i2012-12004-3 |
| Idioma(s) |
eng |
| Publicador |
SPRINGER NEW YORK |
| Relação |
EUROPEAN PHYSICAL JOURNAL E |
| Direitos |
restrictedAccess Copyright SPRINGER |
| Palavras-Chave | #PHASE-TRANSITION #ORDER-PARAMETER #SINGLE-BEAM #Z-SCAN #CHEMISTRY, PHYSICAL #MATERIALS SCIENCE, MULTIDISCIPLINARY #PHYSICS, APPLIED #POLYMER SCIENCE |
| Tipo |
article original article publishedVersion |
