title: Experiments on second- and third-harmonic generation from magnetic metamaterials.
abstract: Photonic metamaterials could provide optical nonlinearities far exceeding those of natural substances due to the combined action of (magnetic) resonances and local-field enhancements. Here, we present our experiments on second- and third-harmonic generation from magnetic metamaterials composed of nanoscale gold split-ring resonators and from control samples for excitation with 170-fs pulses centered at 1.5-microm wavelength. The strongest nonlinear signals are found for resonances with magnetic-dipole character.
authors.affiliation: Institut für Angewandte Physik and DFG-Center for Functional Nanostructures, Universität Karlsruhe, Wolfgang-Gaede-Strasse 1, D-76131 Karlsruhe, Germany.
authors.forename: Matthias W
authors.initials: MW
authors.lastname: Klein
authors.forename: Martin
authors.initials: M
authors.lastname: Wegener
authors.forename: Nils
authors.initials: N
authors.lastname: Feth
authors.forename: Stefan
authors.initials: S
authors.lastname: Linden