title: Second-harmonic generation imaging of metal nano-objects with cylindrical vector beams.
abstract: We introduce an imaging technique based on second-harmonic generation with cylindrical vector beams that is extremely sensitive to three-dimensional orientation and nanoscale morphology of metal nano-objects. Our experiments and second-harmonic field calculations based on frequency-domain boundary element method are in very good agreement. The technique provides contrast for structural features that cannot be resolved by linear techniques or conventional states of polarization and shows great potential for simple and cost-effective far-field optical imaging in plasmonics.
authors.affiliation: Department of Physics, Tampere University of Technology, Tampere, Finland. godofredo.bautista@tut.fi
authors.forename: Godofredo
authors.initials: G
authors.lastname: Bautista
authors.forename: Mikko J
authors.initials: MJ
authors.lastname: Huttunen
authors.forename: Jouni
authors.initials: J
authors.lastname: Mäkitalo
authors.forename: Juha M
authors.initials: JM
authors.lastname: Kontio
authors.forename: Janne
authors.initials: J
authors.lastname: Simonen
authors.forename: Martti
authors.initials: M
authors.lastname: Kauranen
mesh_terms: D021621:Imaging, Three-Dimensional / Q000379:methods*; D008027:Light; D008029:Lighting / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*