Spatiotemporally localized solitons in resonantly absorbing Bragg   reflectors
  We predict the existence of spatiotemporal solitons (``light bullets'') in two-dimensional self-induced transparency media embedded in a Bragg grating. The "bullets" are found in an approximate analytical form, their stability being confirmed by direct simulations. These findings suggest new possibilities for signal transmission control and self-trapping of light. 
M. Blaauboer, G. Kurizki, B.A. Malomed