Experiments on second- and third-harmonic generation from magnetic metamaterials.
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.
Klein
Matthias W
MW
Institut für Angewandte Physik and DFG-Center for Functional Nanostructures, Universität Karlsruhe, Wolfgang-Gaede-Strasse 1, D-76131 Karlsruhe, Germany.
Wegener
Martin
M
Feth
Nils
N
Linden
Stefan
S