title: Anomalous interactions of spatial gap solitons in optically induced photonic lattices.
abstract: We demonstrate coherent interactions between spatial gap solitons in optically induced photonic lattices. Because of the "staggered" phase structures, two in-phase (out-of-phase) bright gap solitons can repel (attract) each other at close proximity, in contrast to soliton interaction in homogeneous media. A reversal of energy transfer direction and a transition between attractive and repulsive interaction forces can be obtained solely by changing the initial soliton separation relative to the lattice spacing.
authors.affiliation: The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Liu
authors.forename: Yi
authors.initials: Y
authors.lastname: Hu
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Xuetao
authors.initials: X
authors.lastname: Gan
authors.forename: Fajun
authors.initials: F
authors.lastname: Xiao
authors.forename: Cibo
authors.initials: C
authors.lastname: Lou
authors.forename: Daohong
authors.initials: D
authors.lastname: Song
authors.forename: Jianlin
authors.initials: J
authors.lastname: Zhao
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Chen