Kivshar Y.S. and M.I. Molina
OPTICS LETTERS 33, 9 (2008)
We study light localization at a phase-slip defect created by two semi-infinite mismatched identical arrays of coupled optical waveguides. We demonstrate that the nonlinear defect modes possess the specific properties of both nonlinear surface modes and discrete solitons. We analyze the stability of the localized modes and their generation in both linear and nonlinear regimes. (C) 2008 Optical Society of America.