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dc.contributor.authorColak, E.en_US
dc.contributor.authorCaglayan, H.en_US
dc.contributor.authorCakmak, A. O.en_US
dc.contributor.authorVilla, A. D.en_US
dc.contributor.authorCapolino, F.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2015-07-28T11:58:38Z
dc.date.available2015-07-28T11:58:38Z
dc.date.issued2009en_US
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/11744
dc.description.abstractA Photonic Crystal (PC) with a surface defect layer (made of dimers) is studied in the microwave regime. The dispersion diagram is obtained with the Plane Wave Expansion Method. The dispersion diagram reveals that the dimer-layer supports a surface mode with negative slope. Two facts are noted: First, a guided (bounded) wave is present, propagating along the surface of the dimer-layer. Second, above the light line, the fast traveling mode couple to the propagating spectra and as a result a directive (narrow beam) radiation with backward characteristics is observed and measured. In this leaky mode regime, symmetrical radiation patterns with respect to the normal to the PC surface are attained. Beam steering is observed and measured in a 70 degrees angular range when frequency ranges in the 11.88-13.69GHz interval. Thus, a PC based surface wave structure that acts as a frequency dependent leaky wave antenna is presented. Angular radiation pattern measurements are in agreement with those obtained via numerical simulations that employ the Finite Difference Time Domain Method (FDTD). Finally, the backward radiation characteristics that in turn suggest the existence of a backward leaky mode in the dimer-layer are experimentally verified using a halved dimer-layer structure. (C) 2009 Optical Society of Americaen_US
dc.language.isoEnglishen_US
dc.source.titleOptics Expressen_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/OE.17.009879en_US
dc.subjectSubwavelength Apertureen_US
dc.subjectTransmissionen_US
dc.subjectLighten_US
dc.subjectAntennaen_US
dc.subjectRadiationen_US
dc.subjectSurfaceen_US
dc.subjectSuperprismen_US
dc.titleFrequency dependent steering with backward leaky waves via photonic crystal interface layeren_US
dc.typeArticleen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage9879en_US
dc.citation.epage9890en_US
dc.citation.volumeNumber17en_US
dc.citation.issueNumber12en_US
dc.identifier.doi10.1364/OE.17.009879en_US
dc.publisherOptical Society of Americaen_US
dc.contributor.bilkentauthorÖzbay, Ekmel


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