We demonstrate power-dependent steering of self-confined light beams propagating in the nonparaxial regime in a guest-host nonlinear medium. Exploiting the Janossy enhancement in dye-doped liquid crystals with reorientational response, we observe sub-mW spatial soliton self-steering as large as 39 degrees, accompanied by trapping of the light spontaneously emitted by the excited dye. The self-turning is modeled in terms of an effective transverse force stemming from the longitudinal electric field in the tightly confined beams, with good agreement between data and simulations.
Piccardi, A., Alberucci, A., Assanto, G. (2010). Self-Turning Self-Confined Light Beams in Guest-Host Media. PHYSICAL REVIEW LETTERS, 104, 213904 [10.1103/PhysRevLett.104.213904].