Optical path control of solitary waves in dye-doped nematic liquid crystals


  • Gaetano Assanto University Roma Tre
  • Benjamin D. Skuse University of Edinburgh
  • Noel Frederick Smyth University of Edinburgh




The light-induced steering of spatial optical solitary waves in dye-doped nematic liquid crystals is analyzed. Shining a control beam through the cell results in a boundary mediated change in the orientation of the molecular director, thereby a perturbation in the refractive index of the medium. This re-orientational effect can optically steer spatial solitary waves propagating in an orthogonal plane within the liquid crystal layer. The equations governing this steering are solved using a Lagrangian formulation, resulting in modulation equations for the self-trapped beam path. Very good agreement is obtained between solutions of the modulation equations and numerical solutions of the full governing equations.

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Author Biography

Noel Frederick Smyth, University of Edinburgh

Professor of Nonlinear Waves,

School of Mathematics




How to Cite

G. Assanto, B. D. Skuse, and N. F. Smyth, “Optical path control of solitary waves in dye-doped nematic liquid crystals”, Photonics Lett. Pol., vol. 1, no. 4, pp. pp. 154–156, Dec. 2009.