Optomechanical hot-spots in metallic nanorod-polymer nanocomposites

dc.contributor.authorVasileiadis, Thomas
dc.date.accessioned2023-03-15T12:41:56Z
dc.date.available2023-03-15T12:41:56Z
dc.date.issued2022-12-07
dc.descriptionExperimental and computational study of optomechanical interactions in plasmonic nanorod - polymer nanocomposites.pl
dc.description.abstractPlasmonic coupling between adjacent metallic nanoparticles can be exploited for acousto-plasmonics, single-molecule sensing, and photochemistry. Light absorption or electron probes can be used to study plasmons and their interactions, but their use is challenging for disordered systems and colloids dispersed in insulating matrices. Here, we investigate the effect of plasmonic coupling on optomechanics with Brillouin light spectroscopy (BLS) in a prototypical metal–polymer nanocomposite, gold nanorods (Au NRs) in polyvinyl alcohol. The intensity of the light inelastically scattered on thermal phonons captured by BLS is strongly affected by the wavelength of the probing light. When light is resonant with the transverse plasmons, BLS reveals mostly the normal vibrational modes of single NRs. For lower energy off-resonant light, BLS is dominated by coupled bending modes of NR dimers. The experimental results, supported by optomechanical calculations, document plasmonically enhanced BLS and reveal energy-dependent confinement of coupled plasmons close to the tips of NR dimers, generating BLS hot-spots. Our work establishes BLS as an optomechanical probe of plasmons and promotes nanorod–soft matter nanocomposites for acousto-plasmonic applications.pl
dc.description.sponsorshipThis project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Action Grant Agreement 101003436 – PLASMMONS. G.F. acknowledges the support by ERC AdG SmartPhon (Grant 694977). T.V. acknowledges the financial support from the Polish National Science Centre (No. UMO-2021/43/D/ST3/02526). B.G. acknowledges the financial support from the Polish National Science Centre (No. UMO-2018/31/D/ST3/03882). B.D.R. and A.N. acknowledge the computer facilities provided by the group ephoni at Institut d’Electronique, Microélectronique and Nanotechnologie, University of Lille. S.Y. acknowledges the support by the National Science Foundation (NSF), DMR/Polymer program, No. DMR-210484.pl
dc.identifier.citationACS Nano 2022, 16, 12, 20419–20429.pl
dc.identifier.doihttps://doi.org/10.1021/acsnano.2c06673
dc.identifier.urihttps://hdl.handle.net/10593/27227
dc.language.isoengpl
dc.publisherAmerican Chemical Societypl
dc.relation.ispartofseriesPhononic and plasmonic materials;4
dc.rightsinfo:eu-repo/semantics/openAccesspl
dc.subjectNanorodspl
dc.subjectPlasmonicspl
dc.subjectOptomechanicspl
dc.subjectNanocompositespl
dc.subjectBrillouin light scatteringpl
dc.titleOptomechanical hot-spots in metallic nanorod-polymer nanocompositespl
dc.typePreprintpl

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