Interaction-induced localization of anomalously-diffracting nonlinear   waves
  We study experimentally the interactions between normal solitons and tilted beams in glass waveguide arrays. We find that as a tilted beam, traversing away from a normally propagating soliton, coincides with the self-defocusing regime of the array, it can be refocused and routed back into any of the intermediate sites due to the interaction, as a function of the initial phase difference. Numerically, distinct parameter regimes exhibiting this behavior of the interaction are identified. 
Y. Linzon, Y. Sivan, B. Malomed, M. Zaezjev, R. Morandotti and S.   Bar-Ad