Sensitivity comparison of localized plasmon resonance structures and prism coupler

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dc.citation.epage521en_US
dc.citation.spage516en_US
dc.citation.volumeNumber191en_US
dc.contributor.authorKaya, Y.en_US
dc.contributor.authorAyas S.en_US
dc.contributor.authorTopal, A. E.en_US
dc.contributor.authorGuner, H.en_US
dc.contributor.authorDana, A.en_US
dc.date.accessioned2016-02-08T11:02:37Z
dc.date.available2016-02-08T11:02:37Z
dc.date.issued2014en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractPlasmon resonances are widely used in biomolecular sensing and continue to be an active research field due to the rich variety of surface and measurement configurations, some of which exhibit down to single molecule level sensitivity. The resonance wavelength shift of the plasmonic structure upon binding of molecules, strongly depends, among other parameters, on how well the field of the resonant mode is confined to the binding site. Here it is shown that, by using properly designed metal-insulator-metal type resonators, improved wavelength response can be achieved with localized surface plasmon resonators (LSPRs) compared to that of the commonly used Kretschmann geometry. Using computational tools we investigate theoretically the refractive index response of several LSPR structures to a 2 nm thin film of binding molecules. LSPR resonators are shown to feature improved sensitivity over conventional Kretschmann geometry in the wavelength interrogation scheme for such a thin film. Moreover, some of the LSPR modes are quasi-omnidirectional and such angular independence (up to 30 angle of incidence) allows higher numerical apertures to be used in colorimetric imaging. Results highlight the potential of LSPRs for biomolecular sensing with high sensitivity and high spatial resolution.en_US
dc.identifier.doi10.1016/j.snb.2013.09.098en_US
dc.identifier.issn0925-4005
dc.identifier.urihttp://hdl.handle.net/11693/26632
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.snb.2013.09.098en_US
dc.source.titleSensors and Actuators B: Chemicalen_US
dc.subjectBiomolecular sensingen_US
dc.subjectLocalized plasmon resonance sensorsen_US
dc.subjectSurface plasmon resonanceen_US
dc.subjectBiomolecular sensingen_US
dc.subjectHigh spatial resolutionen_US
dc.subjectLocalized plasmon resonanceen_US
dc.subjectLocalized surface plasmonen_US
dc.subjectMeasurement configurationen_US
dc.subjectMetal insulator metalsen_US
dc.subjectResonance wavelengthsen_US
dc.subjectWavelength interrogationen_US
dc.subjectMetal insulator boundariesen_US
dc.subjectMoleculesen_US
dc.subjectPlasmonsen_US
dc.subjectRefractive indexen_US
dc.subjectResonatorsen_US
dc.subjectThin filmsen_US
dc.subjectSurface plasmon resonanceen_US
dc.titleSensitivity comparison of localized plasmon resonance structures and prism coupleren_US
dc.typeArticleen_US

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