Bright off-axis directional emission with plasmonic corrugations

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buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage30842en_US
dc.citation.issueNumber25en_US
dc.citation.spage30827en_US
dc.citation.volumeNumber25en_US
dc.contributor.authorSattari, H.en_US
dc.contributor.authorRashed, A. R.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.contributor.authorCaglayan, H.en_US
dc.date.accessioned2018-04-12T11:00:39Z
dc.date.available2018-04-12T11:00:39Z
dc.date.issued2017en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractIn this work, a new plasmonic bulls-eye structure is introduced to efficiently harvest the emitted light from diamond nitrogen vacancy (NV) centers. We show that the presence of a simple metal sub-layer underneath of a conventional bulls-eye antenna, separated by a dielectric layer, results in the spontaneous emission enhancement and increment in out-coupled light intensity. High Purcell factor is accessible in such a structure, which consequently boosts efficiency of the radiated light intensity from the structure. The structure shows considerable enhancement in far-field intensity, about three times higher than that of a one-side corrugated (conventional) optimized structure. In addition, we study for the first time asymmetric structures to steer emitted beams in two-axis. Our results show that spatial off-axial steering over a cone is approachable by introducing optimal asymmetries to grooves and ridges of the structure. The steered light retains a level of intensity even higher than conventional symmetric structures. A high value of directivity of 16 for off-axis steering is reported. © 2017 Optical Society of America.en_US
dc.identifier.doi10.1364/OE.25.030827en_US
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/37028
dc.language.isoEnglishen_US
dc.publisherOSA - The Optical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/OE.25.030827en_US
dc.source.titleOptics Expressen_US
dc.subjectDielectric materialsen_US
dc.subjectAsymmetric structuresen_US
dc.subjectDielectric layeren_US
dc.subjectDirectional emissionen_US
dc.subjectFar-field intensityen_US
dc.subjectNitrogen vacanciesen_US
dc.subjectOptimized structuresen_US
dc.subjectSpontaneous emission enhancementen_US
dc.subjectSymmetric structuresen_US
dc.subjectPlasmonsen_US
dc.titleBright off-axis directional emission with plasmonic corrugationsen_US
dc.typeArticleen_US

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