Infrared fingerprints of natural 2D talc and plasmon-phonon coupling in graphene-talc heterostructures

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dc.creatorIngrid David Barcelos
dc.creatorRoberto Luiz Moreira
dc.creatorHelio Chacham
dc.creatorAlisson Ronieri Cadore
dc.creatorAnanias Borges Alencar
dc.creatorFrancisco Carlos Barbosa Maia
dc.creatorEdrian Mania
dc.creatorRafael Furlan de Oliveira
dc.creatorCarlos César Bof Bufon
dc.creatorÂngelo Malachias de Souza
dc.creatorRaul de Oliveira Freitas
dc.date.accessioned2023-05-30T12:06:56Z
dc.date.accessioned2025-09-08T23:35:42Z
dc.date.available2023-05-30T12:06:56Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.description.sponsorshipFAPESP - Fundação de Amparo à Pesquisa do Estado de São Paulo
dc.identifier.doihttps://doi.org/10.1021/acsphotonics.7b01017
dc.identifier.issn2330-4022
dc.identifier.urihttps://hdl.handle.net/1843/54161
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofACS Photonics
dc.rightsAcesso Restrito
dc.subjectInfravermelho
dc.subjectSíncrotron
dc.subjectPlasmons
dc.subjectNanofotônica
dc.subject.otherSoapstone mine
dc.subject.otherSynchrotron IR nanospectroscopy
dc.subject.otherPlasmonics
dc.subject.otherTwo-dimensional materials
dc.subject.otherGate-tunability
dc.subject.otherNanophotonics
dc.titleInfrared fingerprints of natural 2D talc and plasmon-phonon coupling in graphene-talc heterostructures
dc.typeArtigo de periódico
local.citation.epage1918
local.citation.issue5
local.citation.spage1912
local.citation.volume5
local.description.resumoTwo-dimensional (2D) materials occupy a noteworthy place in nanophotonics providing for subwavelength light confinement and optical phenomena dissimilar to those of their bulk counterparts. In the mid-infrared, graphenebased heterostructures and van der Waals crystals of hexagonal boron nitride (hBN) overwhelmingly concentrate the attention by exhibiting real-space nano-optics features from plasmons, phonon−polaritons, and hybrid plasmon phonon−polaritons. Here we present a prime study on mid-infrared nanophotonics of talc, a natural atomically flat layered material, and graphene-talc (G-talc) heterostructures using broadband synchrotron infrared nanospectroscopy. Wavelength tuning of the talc vibrational resonances, assigned to in- and out-of-plane molecular vibrations, are achieved by changing the thickness of the crystals, which configures a tunable infrared signature for the 2D talc. In G-talc nanostructures, we unveil a coupling of the graphene plasmons polaritons with surface phonons polaritons of talc, originating hybrid surface plasmon−phonon polaritons modes. In analogy to G-hBN and G-SiO2 heterostructures, the coupling in G-talc produces a large increase in the optovibrational activity for the out-of-plane mode as well as it induces a blue-shift for the in-plane mode. Moreover, the coupling can be modulated by an external gate voltage to the heterostructure when mounted in a transistor configuration. Therefore, our results introduce talc and G-talc heterostructures as appealing materials for nanophotonics, especially for applications involving long wavelengths and active electric tuning of opto-vibrational activity.
local.identifier.orcidhttps://orcid.org/0000-0002-5778-7161
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.identifier.orcidhttps://orcid.org/0000-0001-5041-9094
local.identifier.orcidhttps://orcid.org/0000-0003-1081-0915
local.identifier.orcidhttps://orcid.org/0000-0002-9060-534X
local.identifier.orcidhttps://orcid.org/0000-0002-4998-4624
local.identifier.orcidhttps://orcid.org/0000-0001-8980-3587
local.identifier.orcidhttps://orcid.org/0000-0002-1493-8118
local.identifier.orcidhttps://orcid.org/0000-0002-8703-4283
local.identifier.orcidhttps://orcid.org/0000-0002-3285-5447
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://pubs.acs.org/doi/10.1021/acsphotonics.7b01017

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