Experiments on second- and third-harmonic generation from magnetic metamaterials
M. W. Klein, N. Feth, S. Linden, and M. Wegener
- Quelle: Opt. Express 15, 5238 (2007)
- Datum: 13.4.2007
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-μm wavelength. The strongest nonlinear signals are found for resonances with magnetic-dipole character.