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
Original Manuscript: October 11, 2011
Revised Manuscript: October 31, 2011
Manuscript Accepted: November 2, 2011
Published: January 13, 2012
Changming Huang, Shunsheng Zhong, Chunyan Li, and Liangwei Dong, "Surface vector kink solitons," J. Opt. Soc. Am. B 29, 203-208 (2012)