title: Enhanced second-harmonic generation from planar photonic crystals.
abstract: Strongly enhanced second-harmonic generation is observed from a two-dimensional square lattice GaAs/AlGaAs photonic crystal waveguide when the fundamental beam, the second-harmonic beam, or both beams resonantly couple to a leaky eigenmode. P-polarized second-harmonic spectra are obtained for s-polarized, 150-fs pump pulses that are tuned from 5000 to 5600 cm(-1) and directed along the gamma-chi direction of the crystal for various angles of incidence. Compared with off-resonant conditions, enhancements of >1200x in the second-harmonic conversion are observed for resonant coupling of both the fundamental and the second-harmonic fields to leaky eigenmnodes. The angular and spectral positions of the peaks are in good agreement with simulations.
authors.affiliation: Department of Physics, University of Toronto, Toronto, Canada, M5S 1A7. mondia@physics.utoronto.ca
authors.forename: J P
authors.initials: JP
authors.lastname: Mondia
authors.forename: H M
authors.initials: HM
authors.lastname: van Driel
authors.forename: W
authors.initials: W
authors.lastname: Jiang
authors.forename: A R
authors.initials: AR
authors.lastname: Cowan
authors.forename: Jeff F
authors.initials: JF
authors.lastname: Young