Optical nonlinearities induced by electric fields in nematic liquid crystals

Victor Stoian; Cristina Cîirtoaje; Emil Petrescu; Cornelia Moţoc

doi:10.1117/12.2178320

18 May 2015 Optical nonlinearities induced by electric fields in nematic liquid crystals

Victor Stoian, Cristina Cîirtoaje, Emil Petrescu, Cornelia Moţoc

Proceedings Volume 9503, Nonlinear Optics and Applications IX; 95030T (2015) https://doi.org/10.1117/12.2178320
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

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.

Citation Download Citation

Victor Stoian, Cristina Cîirtoaje, Emil Petrescu, and Cornelia Moţoc "Optical nonlinearities induced by electric fields in nematic liquid crystals", Proc. SPIE 9503, Nonlinear Optics and Applications IX, 95030T (18 May 2015); https://doi.org/10.1117/12.2178320

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