Tailored second harmonic generation from self-organized metal nano-wires arrays.
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.
Belardini
Alessandro
A
Dipartimento di Energetica, Sapienza Università di Roma, Via A. Scarpa 16, I-00161 Roma, ITALY. alessandro.belardini@uniroma1.it
Larciprete
Maria C
MC
Centini
Marco
M
Fazio
Eugenio
E
Sibilia
Concita
C
Bertolotti
Mario
M
Toma
Andrea
A
Chiappe
Daniele
D
Buatier de Mongeot
Francesco
F