We show numerically the mutual dragging and locking together of intense fundamental and second-harmonic light beams propagating in second-order nonlinear media, and we discuss the potential applications of such effects for the steering of beams by spatial phase modulation of the input signals.
Torner, L., Torruellas, W., Stegeman, G., Menyuk, C. Beam steering by x(2) trapping. "Optics letters", Setembre 1995, vol. 20, núm. 19, p. 1952-1954.