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Directional excitation of surface plasmons by dielectric resonators

Zou, Chengjun; Withayachumnankul, Withawat; Shadrivov, Ilya V.; Kivshar, Yuri S.; Fumeaux, Christophe

Description

An important aim of current research on plasmonics is to develop compact components to manipulate surface plasmon polaritons (SPPs) and specifically to develop efficient SPP couplers. The commonly used metallic resonators are inefficient to couple free-space waves to SPPs and metallic gratings require oblique incidence for achieving unidirectional propagation. In this article, we propose to use nanoscale nonuniform arrays of dielectric resonator antennas (DRAs) to realize unidirectional...[Show more]

dc.contributor.authorZou, Chengjun
dc.contributor.authorWithayachumnankul, Withawat
dc.contributor.authorShadrivov, Ilya V.
dc.contributor.authorKivshar, Yuri S.
dc.contributor.authorFumeaux, Christophe
dc.date.accessioned2015-04-15T00:20:12Z
dc.date.available2015-04-15T00:20:12Z
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/1885/13247
dc.description.abstractAn important aim of current research on plasmonics is to develop compact components to manipulate surface plasmon polaritons (SPPs) and specifically to develop efficient SPP couplers. The commonly used metallic resonators are inefficient to couple free-space waves to SPPs and metallic gratings require oblique incidence for achieving unidirectional propagation. In this article, we propose to use nanoscale nonuniform arrays of dielectric resonator antennas (DRAs) to realize unidirectional launching of SPPs. DRAs are made of low-loss high-permittivity nanostructures operating on a metal surface. The applications of metallodielectric nanostructures can produce resonances mainly in the low-loss dielectric parts and hence the power dissipated through oscillating current in metal can be reduced. Similar to metallic resonators, DRAs operating near resonance can provide phase control when coupling incident waves into SPPs, adding degrees of freedom in controlling propagation direction. The theoretical analysis in this article, with numerical validation, shows efficient SPPs launching by nonuniform array of cylindrical DRAs into a predesigned direction. Furthermore, with proper patterning, optimal launching can be achieved by avoiding power leakage via deflection into free space. The SPP launching condition and the influence of propagation loss are also mathematically analyzed from the viewpoint of antenna array theory. The SPPs launchers based on DRAs have a potential for applications in highly efficient integrated optics and optical waveguides.
dc.description.sponsorshipC. Fumeaux acknowledges the Australian Research Council (ARC) Future Fellowship funding scheme for support under Grant No. FT100100585.
dc.format8 pages
dc.publisherAmerican Physical Society
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/1098-0121/..."Preprint, post-print or publisher version allowed on author's personal website, employer's website or institutional repository ; Author's post-print on open repository; Publisher's version/PDF may be used ; Link to publisher version required; Publisher copyright and source must be acknowledged with citation" SHERPA/RoMEO site (as at 15/04/15)
dc.rights© 2015 American Physical Society
dc.sourcePhysical Review B
dc.titleDirectional excitation of surface plasmons by dielectric resonators
dc.typeJournal article
local.identifier.citationvolume91
dc.date.issued2015-02-27
local.identifier.absfor020501 - Classical and Physical Optics
local.identifier.ariespublicationa383154xPUB1199
local.publisher.urlhttp://www.aps.org/
local.type.statusPublished Version
local.contributor.affiliationShadrivov, I. V., Nonlinear Physics Centre, The Australian National University
local.contributor.affiliationKivshar, Y. S., Nonlinear Physics Centre, The Australian National University
dc.relationhttp://purl.org/au-research/grants/arc/FT100100585
local.bibliographicCitation.issue8
local.bibliographicCitation.startpage085433-1
local.bibliographicCitation.lastpage085433-1
local.identifier.doi10.1103/PhysRevB.91.085433
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-06-14T08:28:00Z
local.identifier.scopusID2-s2.0-84924053294
CollectionsANU Research Publications

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