Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/65791

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dc.contributor.authorRosa, Henrique G.por
dc.contributor.authorHo, Yi Weipor
dc.contributor.authorVerzhbitskiy, Ivanpor
dc.contributor.authorRodrigues, Manuel José Lima Ferreirapor
dc.contributor.authorTaniguchi, Takashipor
dc.contributor.authorWatanabe, Kenjipor
dc.contributor.authorEda, Gokipor
dc.contributor.authorPereira, Vitor M.por
dc.contributor.authorGomes, José C. V.por
dc.date.accessioned2020-06-29T09:59:14Z-
dc.date.available2020-06-29T09:59:14Z-
dc.date.issued2018-07-03-
dc.identifier.issn2045-2322por
dc.identifier.urihttp://hdl.handle.net/1822/65791-
dc.descriptionSupplementary information accompanies this paper at https://doi.org/10.1038/s41598-018-28374-1por
dc.description.abstractWe report the first detailed characterization of the sheet third-harmonic optical susceptibility, χ(3)s, of tungsten diselenide (WSe2). With a home-built multiphoton microscope setup developed to study harmonics generation, we map the second and third-harmonic intensities as a function of position in the sample, pump power and polarization angle, for single- and few-layers flakes of WSe2. We register a value of |χ(3)s| ≈ 0.9 × 10-28 m3 V-2 at a fundamental excitation frequency of ℏω = 0.8 eV, which is comparable in magnitude to the third-harmonic susceptibility of other group-VI transition metal dichalcogenides. The simultaneously recorded sheet second-harmonic susceptibility is found to be |χ(2)s| ≈ 0.7 × 10-19 m2 V-1 in very good agreement on the order of magnitude with recent reports for WSe2, which asserts the robustness of our values for |χ(3)s|.por
dc.description.sponsorshipY.W.H. acknowledges scholarship support from NGS. G.E. acknowledges financial support from National Research Foundation of Singapore (NRF Research Fellowship NRF-NRFF2011-02 and medium-sized centre programme) and Ministry of Education of Singapore (AcRF Tier 2 MOE2015-T2-2-123). V. M. P. acknowledges fnancial support from Ministry of Education of Singapore (FRC AcRF Tier 1 R-144-000-386-114). J.C.V.G. acknowledges fnancial support from CA2DM through National Research Foundation of Singapore (NRF-CRP Grant No. R-144-000-295-281).por
dc.language.isoengpor
dc.publisherNature Researchpor
dc.rightsopenAccesspor
dc.titleCharacterization of the second- and third-harmonic optical susceptibilities of atomically thin tungsten diselenidepor
dc.typearticlepor
dc.peerreviewedyespor
oaire.citationIssue1por
oaire.citationVolume8por
dc.identifier.doi10.1038/s41598-018-28374-1por
dc.identifier.pmid29968813por
dc.subject.wosScience & Technologypor
sdum.journalScientific Reportspor
Appears in Collections:CDF - OCV - Artigos/Papers (with refereeing)

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