All-optical switching and logic gating with spatial solitons in liquid crystals

M. Peccianti, C. Conti, G. Assanto, A. De Luca, and C. Umeton

App. Phys. Lett. 81, 333-335 (2002)


Using mW light beams to generate spatial solitons in nematic liquid crystals, all-optical switching/logic can be performed on a signal launched in the soliton-induced waveguide. Through the collisional behaviour of solitons in a nonlocal medium, the signal can be steered in angle and output position. A power-dependent X junction, AND and NOR gates are demonstrated.