title: Hybrid discrete solitons.
abstract: The existence and stability of discrete solitons in waveguide arrays exhibiting a linear variation of the effective index and a Kerr nonlinearity is studied. We find that the resonant coupling of the conventional discrete soliton to a linear Wannier-Stark state does not entail soliton decay. We rather observe the formation of a bound state where the Wannier-Stark state gets nonlinearly modified. This results in an infinite number of isolated branches of hybrid discrete solitons.
authors.affiliation: Institute for Condensed Matter Theory and Optics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Pertsch
authors.forename: U
authors.initials: U
authors.lastname: Peschel
authors.forename: F
authors.initials: F
authors.lastname: Lederer