Energy localization through Bragg gratings in quadratic media for second-harmonic generation

C. Conti, G. Assanto, and S. Trillo

Acta Phys. Pol. 95, 719-726 (1999)


In a waveguide for second harmonic generation, a linear corrugation able to couple counterpropagating waves at the second harmonic and/or at the fundamental frequency can induce localization effects through the formation of gap-simultons, i.e. bi-color gap-solitons. These can be slowly moving or stationary, collide and merge. All-optical memories can be envisaged. Experimental feasibility and progress in the field are discussed.