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.
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July 2020
Research Article|
July 02 2020
Colorimetry characterization of molecular reorientation transition in thin nematic cells
Special Collection:
Instabilities and Nonequilibrium Structures
M. J. Morel
;
M. J. Morel
a)
1
Departamento de Física and Millennium Institute for Research in Optics, FCFM, Universidad de Chile
, Casilla 487–3, Santiago, Chile
2
Facultad de Ciencias Naturales and Instituto de Investigaciones Científicas y Tegnológicas (IDICTEC), Universidad de Atacama
, Av. Copayapu 485, Copiapó, Chile
a)Author to whom correspondence should be addressed: mauricio.morel@uda.cl
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U. Bortolozzo;
U. Bortolozzo
3
Institut de Physique de Nice, UMR7010, Université de Nice-Sophia Antipolis, CNRS
, 1361 route des Lucioles, 06560 Valbonne, France
4
HOASYS
, 1047 route des Dolines, 06560 Sophia-Antipolis, France
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M. G. Clerc
;
M. G. Clerc
1
Departamento de Física and Millennium Institute for Research in Optics, FCFM, Universidad de Chile
, Casilla 487–3, Santiago, Chile
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A. Jullien
;
A. Jullien
3
Institut de Physique de Nice, UMR7010, Université de Nice-Sophia Antipolis, CNRS
, 1361 route des Lucioles, 06560 Valbonne, France
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S. Residori
S. Residori
3
Institut de Physique de Nice, UMR7010, Université de Nice-Sophia Antipolis, CNRS
, 1361 route des Lucioles, 06560 Valbonne, France
4
HOASYS
, 1047 route des Dolines, 06560 Sophia-Antipolis, France
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a)Author to whom correspondence should be addressed: mauricio.morel@uda.cl
Note: This article is part of the Focus Issue, instabilities and Nonequilibrium Structures.
Chaos 30, 073102 (2020)
Article history
Received:
January 14 2020
Accepted:
June 09 2020
Citation
M. J. Morel, U. Bortolozzo, M. G. Clerc, A. Jullien, S. Residori; Colorimetry characterization of molecular reorientation transition in thin nematic cells. Chaos 1 July 2020; 30 (7): 073102. https://doi.org/10.1063/1.5145075
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