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dc.contributor.authorTeperik, Tatiana V.
Nordlander, Peter
Aizpurua, Javier
Borisov, Andrei G.
dc.date.accessioned 2013-11-21T19:55:58Z
dc.date.available 2013-11-21T19:55:58Z
dc.date.issued 2013
dc.identifier.citation Teperik, Tatiana V., Nordlander, Peter, Aizpurua, Javier, et al.. "Quantum effects and nonlocality in strongly coupled plasmonic nanowire dimers." Optics Express, 21, no. 22 (2013) Optical Society of America: http://dx.doi.org/10.1364/OE.21.027306.
dc.identifier.urihttps://hdl.handle.net/1911/75182
dc.description.abstract Using a fully quantum mechanical approach we study the optical response of a strongly coupled metallic nanowire dimer for variable separation widths of the junction between the nanowires. The translational invariance of the system allows to apply the time–dependent density functional theory (TDDFT) for nanowires of diameters up to 10 nm which is the largest size considered so far in quantum modeling of plasmonic dimers. By performing a detailed analysis of the optical extinction, induced charge densities, and near fields, we reveal the major nonlocal quantum effects determining the plasmonic modes and field enhancement in the system. These effects consist mainly of electron tunneling between the nanowires at small junction widths and dynamical screening. The TDDFT results are compared with results from classical electromagnetic calculations based on the local Drude and non-local hydrodynamic descriptions of the nanowire permittivity, as well as with results from a recently developed quantum corrected model. The latter provides a way to include quantum mechanical effects such as electron tunneling in standard classical electromagnetic simulations. We show that the TDDFT results can be thus retrieved semi-quantitatively within a classical framework. We also discuss the shortcomings of classical non-local hydrodynamic approaches. Finally, the implications of the actual position of the screening charge density at the gap interfaces are discussed in connection with plasmon ruler applications at subnanometric distances.
dc.language.iso eng
dc.publisher Optical Society of America
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Quantum effects and nonlocality in strongly coupled plasmonic nanowire dimers
dc.type Journal article
dc.contributor.funder Welch Foundation
dc.contributor.funder Office of Naval Research
dc.contributor.funder GENCI
dc.citation.journalTitle Optics Express
dc.contributor.org Laboratory for Nanophotonics
dc.subject.keywordsurface plasmons
plasmonics
dc.citation.volumeNumber 21
dc.citation.issueNumber 22
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1364/OE.21.027306
dc.identifier.pmid 24216954
dc.identifier.grantID C-1222 (Welch Foundation)
dc.identifier.grantID N00014-10-1-0989 (Office of Naval Research)
dc.identifier.grantID x2013057060 (GENCI)
dc.type.publication publisher version


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