title: Tailored second harmonic generation from self-organized metal nano-wires arrays.
abstract: Here we report the second harmonic emission properties of self-organized gold nanowires arrays supported on dielectric substrates with a sub-wavelength periodic pattern. The peculiar morphology of the nanowires, which are locally tilted with respect to the average plane of the substrate, allows to generate maximum second harmonic signal at normal incidence with a polarization direction driven by the orientation of the wires (perpendicular to the wires). The generation efficiency was increased by tailoring the growth process in order to tune the metal plasmon resonance close to the pump field frequency and also by increasing the local tilt of the nanowires.
authors.affiliation: Dipartimento di Energetica, Sapienza Università di Roma, Via A. Scarpa 16, I-00161 Roma, ITALY. alessandro.belardini@uniroma1.it
authors.forename: Alessandro
authors.initials: A
authors.lastname: Belardini
authors.forename: Maria C
authors.initials: MC
authors.lastname: Larciprete
authors.forename: Marco
authors.initials: M
authors.lastname: Centini
authors.forename: Eugenio
authors.initials: E
authors.lastname: Fazio
authors.forename: Concita
authors.initials: C
authors.lastname: Sibilia
authors.forename: Mario
authors.initials: M
authors.lastname: Bertolotti
authors.forename: Andrea
authors.initials: A
authors.lastname: Toma
authors.forename: Daniele
authors.initials: D
authors.lastname: Chiappe
authors.forename: Francesco
authors.initials: F
authors.lastname: Buatier de Mongeot