title: Efficient second-harmonic generation in nonlinear plasmonic waveguide.
abstract: We theoretically studied a nonlinear optical process in a hybrid plasmonic waveguide composed of a nonlinear dielectric waveguide and a metal film with a separation of a thin air gap. Owing to the hybridization effect of guided mode and surface plasmon polariton mode, this particular waveguide is able to confine the optical-field in a deep subwavelength scale together with low propagation loss. Based on this, efficient second-harmonic generations (SHG) were revealed at the fundamental wavelength of λ=1.55 μm with good field confinement. The SHG efficiency, as well as the coupling coefficient and mode area, were analyzed and discussed in detail with respect to the structural parameters.
authors: National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, College of Physics, Nanjing University, Nanjing, China.
authors: F F
authors: FF
authors: Lu
authors: T
authors: T
authors: Li
authors: X P
authors: XP
authors: Hu
authors: Q Q
authors: QQ
authors: Cheng
authors: S N
authors: SN
authors: Zhu
authors: Y Y
authors: YY
authors: Zhu