Dispersion of the Nonlinear Susceptibility of MoS2 and WS2 from Second-Harmonic Scattering Spectroscopy: Article No. 235408

Kevin Bredillet, Jeremy Riporto, Gregory Forcherio, Jeremy Dunklin, Jean-Pierre Wolf, Luigi Bonacina, Yannick Mugnier, Ronan Le Dantec

Research output: Contribution to journalArticlepeer-review

8 Scopus Citations

Abstract

Dispersion of the absolute second-order susceptibility of both MoS2 and WS2 is assessed on a wide spectral excitation range (710–1300 nm) by using second-harmonic scattering spectroscopy (SHS). SHS is an accurate ensemble measurement here applied on well-dispersed suspensions of monodisperse liquid-exfoliated nanosheets showing a high monolayer content. The as-derived, high susceptibility values shed light on the discrepancies between available literature values while evidencing resonances associated with the main excitonic transitions.
Original languageAmerican English
Number of pages7
JournalPhysical Review B
Volume102
Issue number23
DOIs
StatePublished - 2020

NREL Publication Number

  • NREL/JA-5900-78805

Keywords

  • light scattering
  • monolayer films
  • nanophotonics
  • optical second-harmonic generation
  • spectroscopy
  • transition-metal dichalcogenide

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