title: Observation of surface solitons in chirped waveguide arrays.
abstract: We report the observation of surface solitons in chirped semi-infinite waveguide arrays whose waveguides exhibit exponentially decreasing refractive indices. We show that the power threshold for surface wave formation decreases with an increase of the array chirp and that for sufficiently large chirp values linear surface modes are supported.
authors.affiliation: Institute of Applied Physics, Friedrich Schiller University Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Szameit
authors.forename: Y V
authors.initials: YV
authors.lastname: Kartashov
authors.forename: F
authors.initials: F
authors.lastname: Dreisow
authors.forename: M
authors.initials: M
authors.lastname: Heinrich
authors.forename: T
authors.initials: T
authors.lastname: Pertsch
authors.forename: S
authors.initials: S
authors.lastname: Nolte
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann
authors.forename: V A
authors.initials: VA
authors.lastname: Vysloukh
authors.forename: L
authors.initials: L
authors.lastname: Torner