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dc.contributor.authorWeick, Guillaume
dc.contributor.authorWoollacott, Claire
dc.contributor.authorBarnes, William L.
dc.contributor.authorHess, Ortwin
dc.contributor.authorMariani, Eros
dc.date.accessioned2013-06-24T14:46:12Z
dc.date.issued2013
dc.description.abstractWe consider a two-dimensional honeycomb lattice of metallic nanoparticles, each supporting a localized surface plasmon, and study the quantum properties of the collective plasmons resulting from the near-field dipolar interaction between the nanoparticles. We analytically investigate the dispersion, the effective Hamiltonian, and the eigenstates of the collective plasmons for an arbitrary orientation of the individual dipole moments. When the polarization points close to the normal to the plane, the spectrum presents Dirac cones, similar to those present in the electronic band structure of graphene. We derive the effective Dirac Hamiltonian for the collective plasmons and show that the corresponding spinor eigenstates represent Dirac-like massless bosonic excitations that present similar effects to electrons in graphene, such as a nontrivial Berry phase and the absence of backscattering off smooth inhomogeneities. We further discuss how one can manipulate the Dirac points in the Brillouin zone and open a gap in the collective plasmon dispersion by modifying the polarization of the localized surface plasmons, paving the way for a fully tunable plasmonic analogue of graphene.en_GB
dc.identifier.citationVol. 110 (10), article 106801en_GB
dc.identifier.doi10.1103/PhysRevLett.110.106801
dc.identifier.urihttp://hdl.handle.net/10871/11362
dc.language.isoenen_GB
dc.publisherAmerican Physical Societyen_GB
dc.relation.urlhttp://dx.doi.org/10.1103/PhysRevLett.110.106801en_GB
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevLett.110.106801en_GB
dc.subjectElementary Particlesen_GB
dc.subjectGraphiteen_GB
dc.subjectMetal Nanoparticlesen_GB
dc.subjectModels, Theoreticalen_GB
dc.subjectQuantum Theoryen_GB
dc.subjectSurface Plasmon Resonanceen_GB
dc.titleDirac-like plasmons in honeycomb lattices of metallic nanoparticlesen_GB
dc.typeArticleen_GB
dc.date.available2013-06-24T14:46:12Z
dc.identifier.issn0031-9007
pubs.declined2016-02-23T20:15:51.932+0000
pubs.deleted2016-02-23T20:15:51.989+0000
exeter.place-of-publicationUnited States
dc.descriptionCopyright © 2013 American Physical Societyen_GB
dc.identifier.eissn1079-7114
dc.identifier.journalPhysical Review Lettersen_GB


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