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Proceedings Article

Theoretical study of laser-induced thermomechanical effect and new type of orientational optical nonlinearity in twist aligned nematic liquid crystal

[+] Author Affiliations
A. K. Aleksanyan, R. S. Hakobyan

Yerevan State Univ. (Armenia)

Proc. SPIE 7998, International Conference on Laser Physics 2010, 799809 (March 04, 2011); doi:10.1117/12.890864
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From Conference Volume 7998

  • International Conference on Laser Physics 2010
  • Aram V. Papoyan
  • Ashtarak, Armenia | October 12, 2010

abstract

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).

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Citation

A. K. Aleksanyan and 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 (March 04, 2011); doi:10.1117/12.890864; http://dx.doi.org/10.1117/12.890864


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