title: Counterpropagating solitons at boundary of photonic lattices.
abstract: We study numerically the interaction of two counterpropagating (CP) optical beams near the boundary of a truncated one-dimensional photonic lattice. We demonstrate that the mutual coupling of beams suppresses the effective repulsion from the lattice edge, resulting in the formation of CP surface solitons. Such localized beams may propagate in the same, as well as in neighboring, waveguides. We also reveal that the lattice disorder reduces substantially the threshold power for the formation of CP surface states.
authors.affiliation: Institute of Physics, University of Belgrade, P.O. Box 57, 11001 Belgrade, Serbia. jovic@ipb.ac.rs
authors.forename: Dragana
authors.initials: D
authors.lastname: Jović
authors.forename: Dejan
authors.initials: D
authors.lastname: Timotijević
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Piper
authors.forename: Najdan
authors.initials: N
authors.lastname: Aleksić
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
authors.forename: Milivoj
authors.initials: M
authors.lastname: Belić