title: Nonlinear optical response from single spheres coated by a nonlinear monolayer.
abstract: We detected the second-order nonlinear response from single isolated spheres comprised from a centrosymmetric material but covered by a layer of a material with strong second-order nonlinear properties and isolated from an ensemble by the optical trapping technique. We show that when large size parameter spheres are used, the measured second-harmonic efficiency deviates strongly from the prediction of the nonlinear Rayleigh scattering theory. Our results are in very good agreement with the predictions from the exact nonlinear Mie scattering theory.
authors.affiliation: ICFO--Institut de Ciencias Fotoniques, Mediterranean Technology Park, Castelldefels, Barcelona, Spain.
authors.forename: Xavier
authors.initials: X
authors.lastname: Vidal
authors.forename: Andrey
authors.initials: A
authors.lastname: Fedyanin
authors.forename: Alberto
authors.initials: A
authors.lastname: Molinos-Gómez
authors.forename: Satish
authors.initials: S
authors.lastname: Rao
authors.forename: Jordi
authors.initials: J
authors.lastname: Martorell
authors.forename: Dmitri
authors.initials: D
authors.lastname: Petrov