Anisotropic flow control and gate modulation of hybrid phonon-polaritons

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dc.creatorFrancisco Carlos Barbosa Maia
dc.creatorMarkus B. Raschke
dc.creatorRaul de Oliveira Freitas
dc.creatorBrian T. O’Callahan
dc.creatorAlisson Ronieri Cadore
dc.creatorIngrid David Barcelos
dc.creatorLeonardo Cristiano Campos
dc.creatorKenji Watanabe
dc.creatorTakashi Taniguchi
dc.creatorChristoph Friedrich Deneke
dc.creatorAlexey Belyanin
dc.date.accessioned2025-02-23T16:47:38Z
dc.date.accessioned2025-09-08T23:53:23Z
dc.date.available2025-02-23T16:47:38Z
dc.date.issued2019
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.identifier.doihttps://doi.org/10.1021/acs.nanolett.8b03732
dc.identifier.issn1530-6992
dc.identifier.urihttps://hdl.handle.net/1843/80331
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofNano Letters
dc.rightsAcesso Restrito
dc.subjectGrafeno
dc.subjectPolaritons
dc.subjectNanofotônica
dc.subject.otherGraphene/boron nitride
dc.subject.otherHybrid polaritons
dc.subject.otherNanophotonics
dc.subject.otherPolaritonics
dc.subject.otherSynchrotron infrared
dc.subject.otherNear-field optics
dc.titleAnisotropic flow control and gate modulation of hybrid phonon-polaritons
dc.typeArtigo de periódico
local.citation.epage715
local.citation.issue2
local.citation.spage708
local.citation.volume19
local.description.resumoLight–matter interaction in two-dimensional photonic or phononic materials allows for the confinement and manipulation of free-space radiation at sub-wavelength scales. Most notably, the van der Waals heterostructure composed of graphene (G) and hexagonal boron nitride (hBN) provides for gate-tunable hybrid hyperbolic plasmon phonon-polaritons (HP3). Here, we present the anisotropic flow control and gate-voltage modulation of HP3 modes in G-hBN on an air–Au microstructured substrate. Using broadband infrared synchrotron radiation coupled to a scattering-type near-field optical microscope, we launch HP3 waves in both hBN Reststrahlen bands and observe directional propagation across in-plane heterointerfaces created at the air–Au junction. The HP3 hybridization is modulated by varying the gate voltage between graphene and Au. This modifies the coupling of continuum graphene plasmons with the discrete hBN hyperbolic phonon polaritons, which is described by an extended Fano model. This work represents the first demonstration of the control of polariton propagation, introducing a theoretical approach to describe the breaking of the reflection and transmission symmetry for HP3 modes. Our findings augment the degree of control of polaritons in G-hBN and related hyperbolic metamaterial nanostructures, bringing new opportunities for on-chip nano-optics communication and computing.
local.identifier.orcidhttps://orcid.org/0000-0002-4998-4624
local.identifier.orcidhttps://orcid.org/0000-0003-2822-851X
local.identifier.orcidhttps://orcid.org/0000-0002-3285-5447
local.identifier.orcidhttps://orcid.org/0000-0003-1081-0915
local.identifier.orcidhttps://orcid.org/0000-0001-6792-7554
local.identifier.orcidhttps://orcid.org/0000-0003-3701-8119
local.identifier.orcidhttps://orcid.org/0000-0002-1467-3105
local.identifier.orcidhttps://orcid.org/0000-0002-8556-386X
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://pubs.acs.org/doi/10.1021/acs.nanolett.8b03732

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