2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113138We demonstrate how to control independently both spatial and temporal dynamics of slow light. We reveal that specially designed nonlinear waveguide arrays with phase-shifted Bragg gratings demonstrate the frequency-independent spatial diffraction near the edge of the photonic bandgap, where the group velocity of light can be strongly reduced. We show in numerical simulations that such structures allow a great flexibility in designing and controlling dispersion characteristics, and open a way for efficient spatiotemporal self-trapping and the formation of slow-light optical bullets.4 pages, 4 figures; available from http://link.aps.org/abstract/PRL/v97/e233901Opticstext