title: Second-harmonic generation from complementary split-ring resonators.
abstract: We present experiments on second-harmonic generation from arrays of magnetic split-ring resonators and arrays of complementary split-ring resonators. In both cases, the fundamental resonance is excited by the incident femtosecond laser pulses under normal incidence, leading to comparably strong second-harmonic signals. These findings are discussed in terms of Babinet's principle and in terms of a recently developed microscopic classical theory that leads to good agreement regarding the relative and the absolute nonlinear signal strengths. The hydrodynamic convective contribution is found to be the dominant source of second-harmonic generation--in contrast to a previous assignment [Science 313, 502 (2006)].
authors.affiliation: Institut fur Nanotechnologie, Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft, Karlsruhe, Germany. Nils.Feth@physik.uni-karlsruhe.de
authors.forename: N
authors.initials: N
authors.lastname: Feth
authors.forename: S
authors.initials: S
authors.lastname: Linden
authors.forename: M W
authors.initials: MW
authors.lastname: Klein
authors.forename: M
authors.initials: M
authors.lastname: Decker
authors.forename: F B P
authors.initials: FB
authors.lastname: Niesler
authors.forename: Y
authors.initials: Y
authors.lastname: Zeng
authors.forename: W
authors.initials: W
authors.lastname: Hoyer
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: S W
authors.initials: SW
authors.lastname: Koch
authors.forename: J V
authors.initials: JV
authors.lastname: Moloney
authors.forename: M
authors.initials: M
authors.lastname: Wegener