title: Optical nonlinearity enhancement in heterostructures with thick metallic film and truncated photonic crystals.
abstract: It is hard to use bulk metals with high nonlinear susceptibilities since they are nearly opaque. Metal-dielectric photonic crystals can be transparent, but the electric field at each metal layer is still low. We theoretically studied the nonlinear response of heterostructures composed of truncated all-dielectric photonic crystals and thick metallic films. Because of the localized interface modes, both transmittance and the electric field in the metal are enhanced greatly. Compared to metal-dielectric photonic crystals, the critical intensity of threshold for bistability in the heterostructures with the same thickness of metal can be reduced by nearly 2 orders of magnitude.
authors.affiliation: Pohl Institute of Solid State Physics, Tongji University, Shanghai, China.
authors.forename: Gui-Qiang
authors.initials: GQ
authors.lastname: Du
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Jiang
authors.forename: Zhan-Shan
authors.initials: ZS
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Chen