Beaming of electromagnetic waves emitted through a subwavelength annular aperture

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buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage422en_US
dc.citation.issueNumber3en_US
dc.citation.spage419en_US
dc.citation.volumeNumber23en_US
dc.contributor.authorCaglayan, H.en_US
dc.contributor.authorBulu, I.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2016-02-08T10:20:36Z
dc.date.available2016-02-08T10:20:36Z
dc.date.issued2006en_US
dc.departmentDepartment of Physicsen_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractWe study the diffraction of electromagnetic waves from subwavelength metallic circular apertures in the microwave spectrum. The theoretical and experimental demonstration of the near- and far-field electromagnetic distributions for subwavelength circular annular apertures and circular annular apertures surrounded by concentric periodic grooves are reported here. The metallic samples had a subwavelength hole with a diameter of 8 mm and had concentric grooves with a periodicity of 16 mm. 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°. This represents a fourfold reduction when compared with the angular divergence of the beam transmitted from the subwavelength circular aperture. © 2006 Optical Society of America.en_US
dc.identifier.doi10.1364/JOSAB.23.000419en_US
dc.identifier.issn0740-3224
dc.identifier.urihttp://hdl.handle.net/11693/23879
dc.language.isoEnglishen_US
dc.publisherOptical Society of American (OSA)en_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/JOSAB.23.000419en_US
dc.source.titleJournal of the Optical Society of America B: Optical Physicsen_US
dc.subjectElectromagnetic wave diffractionen_US
dc.subjectElectromagnetic wave emissionen_US
dc.subjectElectromagnetic wave transmissionen_US
dc.subjectMicrowave spectroscopyen_US
dc.subjectAngular transmission distributionsen_US
dc.subjectFar-field electromagnetic distributionsen_US
dc.subjectMicrowave spectrumen_US
dc.subjectNear-field electromagnetic distributionsen_US
dc.subjectElectromagnetic wavesen_US
dc.titleBeaming of electromagnetic waves emitted through a subwavelength annular apertureen_US
dc.typeArticleen_US

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