title: 2D Arrays of Hexagonal Plasmonic Necklaces for Enhanced Second Harmonic Generation.
abstract: Hexagonal plasmonic necklaces of silver nanoparticles organized in 2D superlattices on functional ferroelectric templates are fabricated in large-scale spatial regions by using a surfactant-free photo-deposition process. The plasmonic necklaces support broad radiative plasmonic resonances allowing the enhancement of second harmonic generation (SHG) at the ferroelectric domain boundaries. A 400-fold SHG enhancement is achieved at the near-UV spectral region with subsequent interest for technological applications.
authors.affiliation: Departamento Física de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid, 28049, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Gómez-Tornero
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark.
authors.forename: Christos
authors.initials: C
authors.lastname: Tserkezis
authors.affiliation: Departamento Física de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid, 28049, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Mateos
authors.affiliation: Departamento Física de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid, 28049, Spain.
authors.forename: Luisa E
authors.initials: LE
authors.lastname: Bausá
authors.affiliation: Departamento Física de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid, 28049, Spain.
authors.forename: Mariola O
authors.initials: MO
authors.lastname: Ramírez
keywords: ferroelectrics; plasmonic necklaces; second harmonic generation; silver nanoparticles