title: Discrete interband mutual focusing in nonlinear photonic lattices.
abstract: We study nonlinear coupling of mutually incoherent beams associated with different Floquet-Bloch waves in a one-dimensional optically-induced photonic lattice. We demonstrate experimentally how such interactions lead to asymmetric mutual focusing and, for waves with opposite diffraction properties, to simultaneous focusing and defocusing as well as discreteness-induced beam localization and reshaping effects.
authors.forename: Christian
authors.initials: C
authors.lastname: Rosberg
authors.forename: Brendan
authors.initials: B
authors.lastname: Hanna
authors.forename: Dragomir
authors.initials: D
authors.lastname: Neshev
authors.forename: Andrey
authors.initials: A
authors.lastname: Sukhorukov
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski
authors.forename: Yuri
authors.initials: Y
authors.lastname: Kivshar