Stabilization of vector solitons in optical lattices
  We address the properties and dynamical stability of one-dimensional vector lattice solitons in Kerr-type cubic medium with harmonic transverse modulation of refractive index. We discovered that unstable families of scalar lattice solitons can be stabilized via the cross-phase modulation (XPM) in the vector case. It was found that multi-humped vector solitons that are unstable in uniform media where XPM strength is higher than that of self-phase modulation, can also be stabilized by the lattice. 
Yaroslav V. Kartashov, Anna S. Zelenina, Victor A. Vysloukh, Lluis   Torner