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dc.contributor.authorCağlayan, H.en_US
dc.contributor.authorBulu, I.en_US
dc.contributor.authorÖzbay, E.en_US
dc.date.accessioned2016-02-08T11:46:15Z
dc.date.available2016-02-08T11:46:15Z
dc.date.issued2006en_US
dc.identifier.issn0895-2477
dc.identifier.urihttp://hdl.handle.net/11693/27159
dc.description.abstractWe studied the grating-coupling phenomena between surface plasmons and electromagnetic waves in the microwave spectrum. We first present the experimental and theoretical results of an enhanced microwave transmission though a subwavelength circular annular aperture with and without metallic gratings. We demonstrate that a 145-fold enhancement factor could be obtained with a subwavelength circular annular aperture that was surrounded by periodic metallic gratings. This was assisted by the guided mode of the coaxial waveguide and by coupling to the surface plasmons. We present the angular transmission distributions from circular annular apertures, and circular annular apertures surrounded by concentric periodic grooves. At the surface mode resonance frequency, the transmitted electromagnetic waves from the subwavelength circular annular aperture surrounded by concentric periodic grooves have a strong angular confinement with an angular divergence of ±3°. We demonstrate that only the output surface is responsible for the beaming effect. Furthermore, we present the field distributions and showed that there is no beaming effect at the off-resonance frequency. © 2006 Wiley Periodicals, Inc.en_US
dc.language.isoEnglishen_US
dc.source.titleMicrowave and Optical Technology Lettersen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/mop.22015en_US
dc.subjectAnnular apertureen_US
dc.subjectBeamingen_US
dc.subjectEnhanced transmissionen_US
dc.subjectGratingen_US
dc.subjectSubwavelength apertureen_US
dc.subjectSurface plasmonen_US
dc.subjectDiffraction gratingsen_US
dc.subjectElectromagnetic wave transmissionen_US
dc.subjectElectromagnetic wavesen_US
dc.subjectMicrowavesen_US
dc.subjectAnnular apertureen_US
dc.subjectBeamingen_US
dc.subjectEnhanced transmissionen_US
dc.subjectSubwavelength apertureen_US
dc.subjectSurface plasmon resonanceen_US
dc.titlePlasmonic structures with extraordinary transmission and highly directional beaming propertiesen_US
dc.typeArticleen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnologyen_US
dc.citation.spage2491en_US
dc.citation.epage2496en_US
dc.citation.volumeNumber48en_US
dc.citation.issueNumber12en_US
dc.identifier.doi10.1002/mop.22015en_US
dc.publisherWiley Periodicalsen_US


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