title: Nonlinear responses in optical metamaterials: theory and experiment.
abstract: We employed both theoretical calculations and experiments to study the nonlinear responses in optical metamaterials. The spectra of second-harmonic generations measured on a fishnet metamaterial are in quantitative agreements with calculations based on full-wave numerical simulations combined with field integrations, both exhibiting ~80 times enhancements at the magnetic resonance frequency. Our calculations explained several interesting features observed experimentally, and suggested an optimal metamaterial structure to yield the strongest nonlinear signals.
authors.affiliation: State Key Laboratory of Surface Physics, Fudan University, Shanghai, China.
authors.forename: Shiwei
authors.initials: S
authors.lastname: Tang
authors.forename: David J
authors.initials: DJ
authors.lastname: Cho
authors.forename: Hao
authors.initials: H
authors.lastname: Xu
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Y Ron
authors.initials: YR
authors.lastname: Shen
authors.forename: Lei
authors.initials: L
authors.lastname: Zhou