title: Third-harmonic generation from Mie-type resonances of isolated all-dielectric nanoparticles.
abstract: Subwavelength silicon nanoparticles are known to support strongly localized Mie-type modes, including those with resonant electric and magnetic dipolar polarizabilities. Here we compare experimentally the efficiency of the third-harmonic generation from isolated silicon nanodiscs for resonant excitation at the two types of dipolar resonances. Using nonlinear spectroscopy, we observe that the magnetic dipolar mode yields more efficient third-harmonic radiation in contrast to the electric dipolar (ED) mode. This is further supported by full-wave numerical simulations, where the volume-integrated local fields and the directly simulated nonlinear response are shown to be negligible at the ED resonance compared with the magnetic one.This article is part of the themed issue 'New horizons for nanophotonics'.
authors.affiliation: Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia.
authors.forename: Elizaveta V
authors.identifier: http://orcid.org/0000-0001-7633-2376
authors.initials: EV
authors.lastname: Melik-Gaykazyan
authors.affiliation: Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia.
authors.forename: Maxim R
authors.initials: MR
authors.lastname: Shcherbakov
authors.affiliation: Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Shorokhov
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.|Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, 07745 Jena, Germany.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Staude
authors.affiliation: Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM 87185, USA.
authors.forename: Igal
authors.initials: I
authors.lastname: Brener
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
authors.forename: Dragomir N
authors.initials: DN
authors.lastname: Neshev
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
authors.affiliation: Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia fedyanin@nanolab.phys.msu.ru.
authors.forename: Andrey A
authors.initials: AA
authors.lastname: Fedyanin
keywords: Mie scattering; nonlinear optics; optical magnetism; silicon nanoparticles; third-harmonic generation