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Enhanced third-harmonic generation in silicon nanoparticles driven by magnetic response

  • Maxim R. Shcherbakov
  • , Dragomir N. Neshev
  • , Ben Hopkins
  • , Alexander S. Shorokhov
  • , Isabelle Staude
  • , Elizaveta V. Melik-Gaykazyan
  • , Manuel Decker
  • , Alexander A. Ezhov
  • , Andrey E. Miroshnichenko
  • , Igal Brener
  • , Andrey A. Fedyanin
  • , Yuri S. Kivshar

Research output: Contribution to journalArticlepeer-review

612 Scopus citations

Abstract

We observe enhanced third-harmonic generation from silicon nanodisks exhibiting both electric and magnetic dipolar resonances. Experimental characterization of the nonlinear optical response through third-harmonic microscopy and spectroscopy reveals that the third-harmonic generation is significantly enhanced in the vicinity of the magnetic dipole resonances. The field localization at the magnetic resonance results in two orders of magnitude enhancement of the harmonic intensity with respect to unstructured bulk silicon with the conversion efficiency limited only by the two-photon absorption in the substrate.
Original languageEnglish
Pages (from-to)6488-6492
Number of pages5
JournalNano Letters
Volume14
Issue number11
DOIs
StatePublished - Nov 12 2014
Externally publishedYes

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