Plasmon-tunable tip pyramids: monopole nanoantennas for near-field scanning optical microscopy

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dc.creatorThiago de Lourenço e Vasconcelos
dc.creatorBráulio Soares Archanjo
dc.creatorCassiano Rabelo e Silva
dc.creatorCarlos Alberto Achete
dc.creatorAdo Jorio de Vasconcelos
dc.creatorLuiz Gustavo de Oliveira Lopes Cançado
dc.creatorBruno Santos de Oliveira
dc.creatorRogério Valaski
dc.creatorRafael Cavalcante Cordeiro
dc.creatorHelton Gonçalves de Medeiros
dc.creatorAroldo Ribeiro Lopes Neto
dc.creatorPeter Ercius
dc.date.accessioned2022-07-26T13:01:54Z
dc.date.accessioned2025-09-09T01:20:23Z
dc.date.available2022-07-26T13:01:54Z
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.sponsorshipFAPERJ - Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
dc.identifier.doihttps://doi.org/10.1002/adom.201800528
dc.identifier.issn2195-1071
dc.identifier.urihttps://hdl.handle.net/1843/43619
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofAdvanced Optical Materials
dc.rightsAcesso Restrito
dc.subjectPlasmons
dc.subjectMicroscopia ótica
dc.subjectEspectroscopia de Raman
dc.subject.otherTERS
dc.subject.otherNanoantenna
dc.titlePlasmon-tunable tip pyramids: monopole nanoantennas for near-field scanning optical microscopy
dc.typeArtigo de periódico
local.citation.epage6
local.citation.issue20
local.citation.spage1
local.citation.volume6
local.description.resumoSqueezing optical fields into nanometer scale is the key step to perform spatially resolved near-field optics. In scattering-type near-field optical microscopy, this task is accomplished by nanoantennas that convert propagating radiation to local near-fields and vice versa. The usual nanoantenna is composed by an elongated metal structure whose longitudinal dimension is scaled to support dipole modes of localized surface plasmon resonances. However, monopole modes can also be explored if the elongated metal nanoparticle is electrically grounded on a flat metallic plateau that acts like a mirror providing the monopole's image that closes the dipole system. Here, a method for batch production of monopole nanoantennas for scattering-type near-field scanning optical microscopy is presented. The nanoantennas are composed of a micropyramidal body with a nanopyramidal end whose lateral dimension can be scaled to fine-tune localized surface plasmon resonance modes. The monopole character of the nanoantennas is revealed by electron energy loss spectroscopy, and their efficiency and reproducibility are tested in tip-enhanced Raman spectroscopy experiments performed on single-layer graphene and single-walled carbon nanotubes.
local.identifier.orcidhttps://orcid.org/0000-0003-0195-444X
local.identifier.orcidhttps://orcid.org/0000-0001-8145-7712
local.identifier.orcidhttps://orcid.org/0000-0003-0488-2242
local.identifier.orcidhttps://orcid.org/0000-0002-4510-2698
local.identifier.orcidhttps://orcid.org/0000-0002-5978-2735
local.identifier.orcidhttps://orcid.org/0000-0003-0816-0888
local.identifier.orcidhttps://orcid.org/0000-0002-0214-867X
local.identifier.orcidhttps://orcid.org/0000-0002-6762-9976
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://onlinelibrary.wiley.com/doi/full/10.1002/adom.201800528

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