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2008 | 6 | 3 | 575-581

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Possible limitations of the classical model of orientational optical nonlinearity in nematics


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Orientational nonlinearity is the major mechanism of nonlinear optical phenomena observed in liquidcrystalline phase while it does not appear to such extent in any other materials. It is caused by distortion of initial molecular arrangement of an anisotropic medium induced by optical field. Deformation of the anisotropic structure means spatial changes of refractive index of the medium. This effect has been studied in earnest since the 1980s as its application became more apparent. In this paper, some results of experimental examination of molecular reorientation in nematics by optical field are presented, which are not explained in frame of existing Oseen-Frank model and Erickson-Leslie continuous theory. Possible reasons of this discordance are considered and a way of explanation is suggested.










Physical description


1 - 9 - 2008
17 - 7 - 2008


  • Faculty of Physics, Warsaw University of Technology, Warsaw, Poland
  • Faculty of Physics, Warsaw University of Technology, Warsaw, Poland


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