title: Fabrication of Ion-Shaped Anisotropic Nanoparticles and their Orientational Imaging by Second-Harmonic Generation Microscopy.
abstract: Ion beam shaping is a novel and powerful tool to engineer nanocomposites with effective three-dimensional (3D) architectures. In particular, this technique offers the possibility to precisely control the size, shape and 3D orientation of metallic nanoparticles at the nanometer scale while keeping the particle volume constant. Here, we use swift heavy ions of xenon for irradiation in order to successfully fabricate nanocomposites consisting of anisotropic gold nanoparticle that are oriented in 3D and embedded in silica matrix. Furthermore, we investigate individual nanorods using a nonlinear optical microscope based on second-harmonic generation (SHG). A tightly focused linearly or radially-polarized laser beam is used to excite nanorods with different orientations. We demonstrate high sensitivity of the SHG response for these polarizations to the orientation of the nanorods. The SHG measurements are in excellent agreement with the results of numerical modeling based on the boundary element method.
authors.affiliation: Department of Physics Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland.
authors.forename: Abdallah
authors.initials: A
authors.lastname: Slablab
authors.affiliation: Optoelectronics Research Centre, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland.
authors.forename: Tero J
authors.initials: TJ
authors.lastname: Isotalo
authors.affiliation: Department of Physics Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland.
authors.forename: Jouni
authors.initials: J
authors.lastname: Mäkitalo
authors.affiliation: Department of Physics Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland.
authors.forename: Léo
authors.initials: L
authors.lastname: Turquet
authors.affiliation: Laboratoire des Solides Irradiés, Ecole Polytechnique, CEA/DRF/IRAMIS, CNRS, Université Paris-Saclay, Route de Saclay, 91128, Palaiseau, France.
authors.forename: Pierre-Eugène
authors.initials: PE
authors.lastname: Coulon
authors.affiliation: Optoelectronics Research Centre, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland.
authors.forename: Tapio
authors.initials: T
authors.lastname: Niemi
authors.affiliation: Laboratoire de Photonique et Nanostructures; CNRS, Marcoussis, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Ulysse
authors.affiliation: Laboratoire de Physique des Solides CNRS/UMR8502, Bâtiment 510, University Paris-Sud, Orsay, 91405, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Kociak
authors.affiliation: Laboratoire de Photonique et Nanostructures; CNRS, Marcoussis, France.
authors.forename: Dominique
authors.initials: D
authors.lastname: Mailly
authors.affiliation: Laboratoire des Solides Irradiés, Ecole Polytechnique, CEA/DRF/IRAMIS, CNRS, Université Paris-Saclay, Route de Saclay, 91128, Palaiseau, France.
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Rizza
authors.affiliation: Department of Physics Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland.
authors.forename: Martti
authors.initials: M
authors.lastname: Kauranen