Steady-state bright–dark vector spatial solitons in biased two-photon photorefractive crystals

We show that bright–dark vector solitons are possible in biased two-photon photorefractive crystals under steady-state conditions. The analytical solutions of these vector solitons can be obtained if the intensities of the two vector components are approximately equal. When the intensities of the two vector components differ, the vector soliton pair solutions can be determined using simple numerical integration procedures. The stability of the bright–dark vector solitons has been investigated numerically.