Universal saturation behavior in the transient optical response of plasmonic structures

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dc.creatorMychel Gonçalves Silva
dc.creatorGiuseppe Della Valle
dc.creatorDanielle Cristina Teles Ferreira
dc.creatorLívia Siman Gomes
dc.creatorClaudilene Ribeiro Chaves
dc.creatorLuiz Orlando Ladeira
dc.creatorStefano Longhi
dc.creatorGiulio Cerullo
dc.creatorCristian Manzoni
dc.creatorAna Maria de Paula
dc.date.accessioned2023-02-27T17:02:37Z
dc.date.accessioned2025-09-09T00:00:04Z
dc.date.available2023-02-27T17:02:37Z
dc.date.issued2018-09-05
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.identifier.doihttps://doi.org/10.1103/PhysRevB.98.115407
dc.identifier.issn2469-9969
dc.identifier.urihttps://hdl.handle.net/1843/50455
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Restrito
dc.subjectNanomateriais
dc.subjectNanofotônica
dc.subject.otherDinâmica de portadores
dc.subject.otherNanomateriais
dc.subject.otherResolução temporal
dc.subject.otherElétron-fônon
dc.titleUniversal saturation behavior in the transient optical response of plasmonic structures
dc.typeArtigo de periódico
local.citation.epage115407-5
local.citation.issue11
local.citation.spage115407-1
local.citation.volume98
local.description.resumoWe perform ultrafast pump-probe spectroscopy of plasmonic structures beyond the perturbative excitation regime. As a prototypical system we choose gold nanorods dispersed in water, which display both longitudinal and transverse plasmon resonances. A broadband investigation reveals a complex scenario for the saturation of the transient optical response as a function of the pump fluence, with strong dependence on the probe wavelength. In particular, we observed stronger saturation effects for the high energy transverse plasmonic resonance as compared to the low energy longitudinal one. This behavior is well captured by a three-temperature model and is understood in terms of the nonlinearity of the Fermi-smearing mechanism, presiding over the optical nonlinearity of noble metal nanomaterials. Our results highlight a universal saturation dynamics in the transient optical response of plasmon-enhanced photonic structures excited by intense light beams, with potential impact on many applications, from the all-optical modulation of light to photovoltaics and photocatalysis.
local.identifier.orcidhttps://orcid.org/0000-0001-6221-6286
local.identifier.orcidhttps://orcid.org/0000-0003-0117-2683
local.identifier.orcidhttps://orcid.org/0000-0001-8001-4709
local.identifier.orcidhttps://orcid.org/0000-0002-4031-558X
local.identifier.orcidhttps://orcid.org/0000-0002-4935-6070
local.identifier.orcidhttps://orcid.org/0000-0002-8739-3542
local.identifier.orcidhttps://orcid.org/0000-0002-9534-2702
local.identifier.orcidhttps://orcid.org/0000-0002-4169-8869
local.identifier.orcidhttps://orcid.org/0000-0002-8551-5948
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.115407

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