title: Design and construction of a spin-wave lens.
abstract: In this work, we present the focusing of a Damon-Eshbach wave in a Ni80Fe20 film by a shaped, discrete transition of the film thickness. We devised an algorithm to determine the required shape of a spin-wave lens. Due to the anisotropy three geometries qualify as plano-convex lenses. One lens geometry has been realized experimentally and the emitted spin-wave pattern is investigated by time-resolved scanning Kerr microscopy.
authors.affiliation: Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Jan-Niklas
authors.initials: JN
authors.lastname: Toedt
authors.affiliation: Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Mark
authors.initials: M
authors.lastname: Mundkowski
authors.affiliation: Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Detlef
authors.initials: D
authors.lastname: Heitmann
authors.affiliation: Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Mendach
authors.affiliation: Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Hansen