2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/225328We demonstrate that interfaces between two nonlinear periodic photonic lattices offer unique possibilities for controlling nonlinear interaction between different spectral components of polychromatic light, and a change in the light spectrum can have a dramatic effect on the propagation along the interface. We predict the existence of polychromatic surface solitons which differ fundamentally from their counterparts in infinite lattices.3 pages, 5 figuresPattern Formation and Solitonstext