Nanophotonics of mid-infrared plasmon-polaritons at interfaces between metals and two-dimensional crystals

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dc.contributor.authorFeres F.H.
dc.contributor.authorBarcelos I.D.
dc.contributor.authorBahamon D.A.
dc.contributor.authorLevandoski J.E.
dc.contributor.authorMancini A.
dc.contributor.authordos Santos T.M.
dc.contributor.authorMayer R.A.
dc.contributor.authorCamargo D.H.S.
dc.contributor.authorBufon C.C.B.
dc.contributor.authorCernescu A.
dc.contributor.authorMaier S.A.
dc.contributor.authorFreitas R.D.O.
dc.contributor.authorMaia F.C.B.
dc.date.accessioned2025-06-01T06:13:55Z
dc.date.available2025-06-01T06:13:55Z
dc.date.issued2025
dc.description.abstract© 2025 The Royal Society of Chemistry.The optical response of metal/dielectric interfaces is largely influenced by surface plasmon-polariton (SPP) modes. In the mid-infrared (IR) range, SPPs can probe the inner physicochemical properties of metal/dielectric systems, including interfaces with mid-IR polaritonic 2D crystals. Using advanced nanoscopy techniques, we characterize mid-IR SPP modes at air/gold and hexagonal boron nitride (hBN) 2D crystal/gold interfaces via synchrotron infrared nanospectroscopy (SINS) and scattering-scanning near-field optical microscopy (s-SNOM) imaging. SPPs in these systems show micrometer-sized wavelengths and propagation lengths over 20 micrometers at room temperature. In hBN/Au, both SPPs and hyperbolic phonon polaritons (HPhPs) coexist, creating SPP-HPhP wave superposition. The experimental momentum and damping of the SPP waves are determined from the s-SNOM imaging and the SINS spatio-spectral linescan. Thereby, we retrieve the experimental frequency-momentum dispersion relation, presenting excellent agreement with theory. Furthermore, we characterize an anti-crossing of the SPP dispersion near the in-plane transverse optical phonon frequency of hBN, indicating that SPP modes and phonon form a coupled system interacting in the strong coupling regime. Such an interaction of SPPs with phonons can be further explored to enhance the sensibility of mid-IR nanospectroscopy techniques.
dc.identifier.doi10.1039/d4nr04543b
dc.identifier.issnNone
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/40900
dc.relation.ispartofNanoscale
dc.rightsAcesso Restrito
dc.titleNanophotonics of mid-infrared plasmon-polaritons at interfaces between metals and two-dimensional crystals
dc.typeArtigo
local.scopus.citations0
local.scopus.eid2-s2.0-105005631814
local.scopus.subject2-D crystals
local.scopus.subjectMicroscopy imaging
local.scopus.subjectMidinfrared
local.scopus.subjectOptical response
local.scopus.subjectPhonon polaritons
local.scopus.subjectPlasmon-polaritons
local.scopus.subjectScanning near-field optical microscopy
local.scopus.subjectSurface plasmon polariton modes
local.scopus.subjectSurface-plasmon
local.scopus.subjectTwo-dimensional crystals
local.scopus.updated2025-06-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105005631814&origin=inward
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