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Proceedings Paper

Optical nonlinearities induced by electric fields in nematic liquid crystals
Author(s): Victor Stoian; Cristina Cîirtoaje; Emil Petrescu; Cornelia Moţoc
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Paper Abstract

Nonlinear phenomena induced by an electric field inside a nematic liquid crystal were studied. A planar oriented cell filled with 5CB nematic liquid crystal was subjected to an external voltage, higher than the threshold value for the Freedericksz transition, and a laser beam was sent perpendicular to the cell. Circular fringes appeared on the screen. The maximum number of diffraction fringes for different voltage values was measured and the experimental plot were in good agreement with theory. We performed a set of dynamic measurements of the fringes evolution from the moment when the laser beam was applied until the maximum number of fringes was reached, for each voltage, and the results were consistent with theoretical pattern.

Paper Details

Date Published: 18 May 2015
PDF: 7 pages
Proc. SPIE 9503, Nonlinear Optics and Applications IX, 95030T (18 May 2015); doi: 10.1117/12.2178320
Show Author Affiliations
Victor Stoian, Univ. Politehnica of Bucharest (Romania)
Cristina Cîirtoaje, Univ. Politehnica of Bucharest (Romania)
Emil Petrescu, Univ. Politehnica of Bucharest (Romania)
Cornelia Moţoc, Univ. Politehnica of Bucharest (Romania)


Published in SPIE Proceedings Vol. 9503:
Nonlinear Optics and Applications IX
Mario Bertolotti; Joseph W. Haus; Alexei M. Zheltikov, Editor(s)

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