Colorimetry characterization of molecular reorientation transition in thin nematic cells

Morel, M. J.; Bortolozzo, U.; Clerc, M. G.; Jullien, A.; Residori, S.


The characterization of equilibria and their transition is fundamental in dynamic systems. Experimentally, the characterization of transitions is complex due to time scales separation, the effect of thermal fluctuations, and inherent experimental imperfections. Liquid crystal devices are derived from the manipulation of the molecular reorientation and transition between them by employing external electrical and magnetic fields. Here, we investigate and determine the Fréedericksz transition using hue measurements of the transmitted light in thin nematic liquid crystal cells. Based on birefringent retardation experienced by transmitted light due to molecular reorientation, the color adjustment of the nematic liquid crystal cells under white light illumination is characterized. By monitoring the hue of the transmitted light, the bifurcation diagram is determined. As a function of the voltage frequency, the critical transition voltage is characterized. The critical voltage increases with the applied frequency

Más información

Título de la Revista: Chaos: An Interdisciplinary Journal of Nonlinear Science
Volumen: 30
Número: 7
Editorial: American Institute of Physics
Fecha de publicación: 2020
Página de inicio: 073102
Idioma: English
Financiamiento/Sponsor: M.G.C. and M.J.M. acknowledge the financial support to the Millennium Institute for Research in Optics (MIRO) and Fondecyt Project (Nos. 1180903 and 3170509).