Soliton control in fading optical lattices
  We predict new phenomena, such as soliton steering and soliton fission, in optical lattices that fade away exponentially along the propagation direction. Such lattices, featuring tunable decay rates, arise in photorefractive crystals in the wavelength range 360-400 nm. We show that the predicted phenomena offer different opportunities for soliton control. 
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner