title: Surface-enhanced optical third-harmonic generation in Ag island films.
abstract: Surface-enhanced optical third-harmonic generation (THG) is observed in silver island films. The THG intensity from Ag nanoparticles is enhanced by more than 2 orders of magnitude with respect to the THG intensity from a smooth and homogeneous silver surface. This enhancement is attributed to a local plasmon excitation and resonance of the local field at the third-harmonic wavelength. The diffuse and depolarized component of the enhanced THG is associated with the third-order hyper-Rayleigh scattering in a two-dimensional random array of silver nanoparticles.
authors.affiliation: Department of Physics, Moscow State University, 119992 Moscow, Russia.
authors.forename: E M
authors.initials: EM
authors.lastname: Kim
authors.forename: S S
authors.initials: SS
authors.lastname: Elovikov
authors.forename: T V
authors.initials: TV
authors.lastname: Murzina
authors.forename: A A
authors.initials: AA
authors.lastname: Nikulin
authors.forename: O A
authors.initials: OA
authors.lastname: Aktsipetrov
authors.forename: M A
authors.initials: MA
authors.lastname: Bader
authors.forename: G
authors.initials: G
authors.lastname: Marowsky