Signal processing by opto-optical interactions between self-localized   and free propagating beams in liquid crystals
  The reorientational nonlinearity of nematic liquid crystals enables a self-localized spatial soliton and its waveguide to be deflected or destroyed by a control beam propagating across the cell. We demonstrate a simple all-optical readdressing scheme by exploiting the lens-like perturbation induced by an external beam on both a nematicon and a co-polarized guided signal of different wavelength. Angular steering as large as 2.2 degrees was obtained for control powers as low as 32mW in the near infrared. 
Alessia Pasquazi, Alessandro Alberucci, Marco Peccianti and Gaetano   Assanto