Raman enhancement on a broadband meta-surface

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buir.contributor.authorOkyay, Ali Kemal
dc.citation.epage6861en_US
dc.citation.issueNumber8en_US
dc.citation.spage6852en_US
dc.citation.volumeNumber6en_US
dc.contributor.authorAyas S.en_US
dc.contributor.authorGüner, H.en_US
dc.contributor.authorTürker, B.en_US
dc.contributor.authorEkiz, O. O.en_US
dc.contributor.authorDirisaglik, F.en_US
dc.contributor.authorOkyay, Ali Kemalen_US
dc.contributor.authorDâna, A.en_US
dc.date.accessioned2016-02-08T09:45:11Z
dc.date.available2016-02-08T09:45:11Z
dc.date.issued2012-07-30en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractPlasmonic metamaterials allow confinement of light to deep subwavelength dimensions, while allowing for the tailoring of dispersion and electromagnetic mode density to enhance specific photonic properties. Optical resonances of plasmonic molecules have been extensively investigated; however, benefits of strong coupling of dimers have been overlooked. Here, we construct a plasmonic meta-surface through coupling of diatomic plasmonic molecules which contain a heavy and light meta-atom. Presence and coupling of two distinct types of localized modes in the plasmonic molecule allow formation and engineering of a rich band structure in a seemingly simple and common geometry, resulting in a broadband and quasi-omni-directional meta-surface. Surface-enhanced Raman scattering benefits from the simultaneous presence of plasmonic resonances at the excitation and scattering frequencies, and by proper design of the band structure to satisfy this condition, highly repeatable and spatially uniform Raman enhancement is demonstrated. On the basis of calculations of the field enhancement distribution within a unit cell, spatial uniformity of the enhancement at the nanoscale is discussed. Raman scattering constitutes an example of nonlinear optical processes, where the wavelength conversion during scattering may be viewed as a photonic transition between the bands of the meta-material.en_US
dc.identifier.doi10.1021/nn301665aen_US
dc.identifier.issn1936-0851
dc.identifier.urihttp://hdl.handle.net/11693/21355
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/nn301665aen_US
dc.source.titleACS Nanoen_US
dc.subjectCoupled plasmonic modesen_US
dc.subjectMetamaterialsen_US
dc.subjectPlasmonicsen_US
dc.subjectSurface-enhanced Raman spectroscopyen_US
dc.subjectBasis of calculationen_US
dc.subjectElectromagnetic modesen_US
dc.subjectField enhancementen_US
dc.subjectLocalized modesen_US
dc.subjectNano scaleen_US
dc.subjectNonlinear optical processen_US
dc.subjectOptical resonanceen_US
dc.subjectPhotonic propertiesen_US
dc.subjectPlasmonicen_US
dc.subjectPlasmonic metamaterialsen_US
dc.subjectPlasmonicsen_US
dc.subjectProper designen_US
dc.subjectRaman enhancementen_US
dc.subjectScattering frequencyen_US
dc.subjectSpatial uniformityen_US
dc.subjectStrong couplingen_US
dc.subjectSub-wavelengthen_US
dc.subjectSurface enhanced Raman scattering (SERS)en_US
dc.subjectSurface enhanced Raman spectroscopyen_US
dc.subjectUnit cellsen_US
dc.subjectBand structureen_US
dc.subjectMetamaterialsen_US
dc.subjectMoleculesen_US
dc.subjectQuantum opticsen_US
dc.subjectRaman scatteringen_US
dc.subjectRaman spectroscopyen_US
dc.subjectPlasmonsen_US
dc.subjectMetal nanoparticleen_US
dc.subjectChemical modelen_US
dc.subjectChemical structureen_US
dc.subjectChemistryen_US
dc.subjectComputer simulationen_US
dc.subjectLighten_US
dc.subjectMaterials testingen_US
dc.subjectMethodologyen_US
dc.subjectRadiation scatteringen_US
dc.subjectSurface plasmon resonanceen_US
dc.subjectUltrastructureen_US
dc.subjectComputer simulationen_US
dc.subjectLighten_US
dc.subjectMaterials testingen_US
dc.subjectMetal nanoparticlesen_US
dc.subjectMolecularen_US
dc.subjectRadiationen_US
dc.subjectSurface plasmon resonanceen_US
dc.titleRaman enhancement on a broadband meta-surfaceen_US
dc.typeArticleen_US

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Institute of Materials Science and Nanotechnology (UNAM)
Department of Electrical and Electronics Engineering