4 March 2011Theoretical study of laser-induced thermomechanical effect and new
type of orientational optical nonlinearity in twist aligned nematic
liquid crystal
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We present theoretical study of the third type thermomechanical effect in twist aligned nematic liquid crystal cell. Euler-
Lagrange-Rayleigh variation method is applied together with the heat-transfer equation to analyze the laser-induced
nonlinearity and director reorientation due to the third type thermomechanical effect. Director reorientation due to a
transversal 2-dimensional temperature gradient is considered. Director equation is solved numerically and phase shift
distribution is presented. It was explained that phase shift is zero in some areas because temperature gradient x and y
components compete with each other to reorient the director in opposite directions. It was shown that maximum phase
shift is at the same range as that for the Giant Optical Nonlinearity (GON).
A. K Aleksanyan andR. S Hakobyan
"Theoretical study of laser-induced thermomechanical effect and new
type of orientational optical nonlinearity in twist aligned nematic
liquid crystal", Proc. SPIE 7998, International Conference on Laser Physics 2010, 799809 (4 March 2011); https://doi.org/10.1117/12.890864
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A. K Aleksanyan, R. S Hakobyan, "Theoretical study of laser-induced thermomechanical effect and new type of orientational optical nonlinearity in twist aligned nematic liquid crystal," Proc. SPIE 7998, International Conference on Laser Physics 2010, 799809 (4 March 2011); https://doi.org/10.1117/12.890864