title: Spatial frequency combs and supercontinuum generation in one-dimensional photonic lattices.
abstract: We experimentally demonstrate the formation of spatial supercontinuum and of spatial frequency combs in nonlinear photonic lattices. This process results from multiple four-wave mixing initiated by launching two Floquet-Bloch modes into a one-dimensional lattice. The dynamics of the waves is sensitively dependent on the transverse momentum difference between the two initial modes: when this momentum difference is commensurable with the lattice momentum the waves evolve into a frequency comb, whereas when it is incommensurable the waves evolve into a supercontinuum of spatial frequencies.
authors.affiliation: Institute of Physics and Physical Technologies, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany.
authors.forename: Rong
authors.initials: R
authors.lastname: Dong
authors.forename: Christian E
authors.initials: CE
authors.lastname: Rüter
authors.forename: Detlef
authors.initials: D
authors.lastname: Kip
authors.forename: Ofer
authors.initials: O
authors.lastname: Manela
authors.forename: Mordechai
authors.initials: M
authors.lastname: Segev
authors.forename: Chengliang
authors.initials: C
authors.lastname: Yang
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu