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dc.contributor.authorCollins, Seanen
dc.contributor.authorRinge, Emilieen
dc.contributor.authorDuchamp, Martialen
dc.contributor.authorSaghi, Zineben
dc.contributor.authorDunin-Borkowski, Rafal Een
dc.contributor.authorMidgley, Paulen
dc.date.accessioned2015-10-21T11:35:05Z
dc.date.available2015-10-21T11:35:05Z
dc.date.issued2015-10-16en
dc.identifier.citationACS Photonics 2015, 2(11): 1628–1635. doi:10.1021/acsphotonics.5b00421en
dc.identifier.issn2330-4022
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/252350
dc.description.abstractPlasmonic devices designed in three dimensions enable careful tuning of optical responses for control of complex electromagnetic interactions on the nanoscale. Probing the fundamental characteristics of the constituent nanoparticle building blocks is, however, often constrained by diffraction-limited spatial resolution in optical spectroscopy. Electron microscopy techniques, including electron energy loss spectroscopy (EELS), have recently been developed to image surface plasmon resonances qualitatively at the nanoscale in three dimensions using tomographic reconstruction techniques. Here, we present an experimental realization of a distinct method that uses direct analysis of modal surface charge distributions to reconstruct quantitatively the three-dimensional eigenmodes of a silver right bipyramid on a metal oxide substrate. This eigenmode tomography removes ambiguity in two-dimensional imaging of spatially-localized plasmonic resonances, reveals substrate-induced mode degeneracy breaking in the bipyramid, and enables EELS for the analysis not of a particular electron-induced response but of the underlying geometric modes characteristic of particle surface plasmons.
dc.description.sponsorshipS.M.C. acknowledges support of a Gates Cambridge Scholarship. E.R. acknowledges support from the Royal Society's Newton International Fellowship scheme and a Trinity Hall Research Fellowship. We thank Ben Knappet for assistance with the synthesis of the silver bipyramids. We thank F.J. de la Peña for helpful discussions on the use of HYPERSPY. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Program (No. FP7/2007-2013)/ERC Grant Agreement No. 291522-3DIMAGE and the European Union's Seventh Framework Program under a contract for an Integrated Infrastructure Initiative (Reference No. 312483-ESTEEM2)
dc.languageEnglishen
dc.language.isoenen
dc.publisherACS
dc.rightsACS AuthorChoice License
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.html
dc.subjectsurface plasmonen
dc.subjectEELSen
dc.subjecttomographyen
dc.subjectnanoparticlesen
dc.titleEigenmode tomography of surface charge oscillations of plasmonic nanoparticles by electron energy loss spectroscopyen
dc.typeArticle
dc.description.versionThis is the final version of the article. It was first available from ACS via http://dx.doi.org/10.1021/acsphotonics.5b00421en
prism.endingPage1635
prism.publicationDate2015en
prism.publicationNameACS Photonicsen
prism.startingPage1628
prism.volume2en
rioxxterms.versionofrecord10.1021/acsphotonics.5b00421en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-10-16en
dc.contributor.orcidCollins, Sean [0000-0002-5151-6360]
dc.contributor.orcidRinge, Emilie [0000-0003-3743-9204]
dc.contributor.orcidMidgley, Paul [0000-0002-6817-458X]
dc.identifier.eissn2330-4022
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Research Council (291522)
pubs.funder-project-idEC FP7 CP WITH CSA (312483)


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