Femtosecond Nonlinear Optical Properties of 2D Metallic NbS2in the near Infrared

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dc.contributor.authorMaldonado M.
dc.contributor.authorDa Silva Neto M.L.
dc.contributor.authorVianna P.G.
dc.contributor.authorRibeiro H.B.
dc.contributor.authorGordo V.O.
dc.contributor.authorCarvalho I.C.S.
dc.contributor.authorDe S. Menezes L.
dc.contributor.authorDe Araujo C.B.
dc.contributor.authorDe Matos C.J.S.
dc.contributor.authorSeixas L.
dc.contributor.authorJawaid A.M.
dc.contributor.authorBusch R.
dc.contributor.authorRitter A.J.
dc.contributor.authorVaia R.A.
dc.contributor.authorGomes A.S.L.
dc.date.accessioned2024-03-12T23:47:28Z
dc.date.available2024-03-12T23:47:28Z
dc.date.issued2020
dc.description.abstractCopyright © 2020 American Chemical Society.The understanding of the nonlinear optical (NLO) properties of photonic materials is relevant and necessary for basic studies and technological developments. Among the materials with high optical nonlinearities, layered transition-metal dichalcogenides (LTMDs) have attracted considerable attention from the viewpoint of both synthesis as well as characterization and applications. We report here the third-order NLO properties of one LTMD - the metallic NbS2 - that was prepared by a modified redox exfoliated method, suspended in acetonitrile. The LTMD was morphologically and compositionally characterized using transmission electron microscopy, atomic force microscopy, X-ray diffraction, Raman scattering, and linear absorption. The Z-scan technique was employed to characterize the nonlinear refraction (NLR) and nonlinear absorption (NLA) behavior in the femtosecond regime. Metallic NbS2 presented a sign inversion of the nonlinear refractive index from negative (self-defocusing) to positive (self-focusing) with the increase of intensity up to 100 GW/cm2. Two distinct features characteristic of NLA, two-photon absorption and saturated absorption, were also observed for different intensity ranges, with the former evolving into the latter as the intensity increased in the same range as for the NLR measurements. The material's band structure of NbS2 was calculated using the density functional theory, and the origin of the nonlinearities is discussed by comparison with the experimental data.
dc.description.firstpage15425
dc.description.issuenumber28
dc.description.lastpage15433
dc.description.volume124
dc.identifier.doi10.1021/acs.jpcc.0c02383
dc.identifier.issn1932-7455
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34951
dc.relation.ispartofJournal of Physical Chemistry C
dc.rightsAcesso Restrito
dc.titleFemtosecond Nonlinear Optical Properties of 2D Metallic NbS2in the near Infrared
dc.typeArtigo
local.scopus.citations27
local.scopus.eid2-s2.0-85087680376
local.scopus.subjectHigh optical nonlinearities
local.scopus.subjectLayered transition metal dichalcogenides
local.scopus.subjectNonlinear absorptions
local.scopus.subjectNonlinear optical properties
local.scopus.subjectNonlinear refractive index
local.scopus.subjectSaturated absorptions
local.scopus.subjectTechnological development
local.scopus.subjectTwo photon absorption
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85087680376&origin=inward
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