Slow-light switching in nonlinear Bragg-grating coupler
  We study propagation and switching of slow-light pulses in nonlinear couplers with phase-shifted Bragg gratings. We demonstrate that power-controlled nonlinear self-action of light can be used to compensate dispersion-induced broadening of pulses through the formation of gap solitons, to control pulse switching in the coupler, and to tune the propagation velocity. 
Sangwoo Ha, Andrey A. Sukhorukov, Yuri S. Kivshar