2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80613We demonstrate the first fully controlled generation of immobile and slow spatial gap solitons in nonlinear periodic systems with band-gap spectra, and reveal the key features of gap solitons which distinguish them from conventional counterparts, including a dynamical transformation of gap solitons due to nonlinear inter-band coupling. We also predict theoretically and confirm experimentally the effect of anomalous steering of gap solitons in optically-induced photonic lattices.4 pages, 5 figuresPattern Formation and SolitonsOpticstext