Abstract

We elucidate the stability properties of vector kink solitons at an interface separating a defocusing Kerr medium and an imprinted semi-infinite photonic lattice. The mutual trapping between two orthogonally polarized components results in the formation of vector states composed of well-known components in various forms, i.e., out-of-phase kinks, in-phase kinks, and surface gap solitons. Linear stability analysis reveals that a vector soliton composed of two out-of-phase kinks or an out-of-phase kink and a surface gap soliton can propagate stably in a wide parameter region. Our finding provides an example of stable vector solitons with nonvanishing amplitudes at infinity.

© 2012 Optical Society of America

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