Grating coupler integrated photodiodes for plasmon resonance based sensing

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buir.contributor.authorGüler, Mustafa O.
dc.citation.epage287en_US
dc.citation.issueNumber2en_US
dc.citation.spage282en_US
dc.citation.volumeNumber11en_US
dc.contributor.authorTurker, B.en_US
dc.contributor.authorGuner, H.en_US
dc.contributor.authorAyas S.en_US
dc.contributor.authorEkiz, O. O.en_US
dc.contributor.authorAcar, H.en_US
dc.contributor.authorGüler, Mustafa O.en_US
dc.contributor.authorDâna, A.en_US
dc.date.accessioned2016-02-08T09:54:44Z
dc.date.available2016-02-08T09:54:44Z
dc.date.issued2011en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractIn this work, we demonstrate an integrated sensor combining a grating-coupled plasmon resonance surface with a planar photodiode. Plasmon enhanced transmission is employed as a sensitive refractive index (RI) sensing mechanism. Enhanced transmission of light is monitored via the integrated photodiode by tuning the angle of incidence of a collimated beam near the sharp plasmon resonance condition. Slight changes of the effective refractive index (RI) shift the resonance angle, resulting in a change in the photocurrent. Owing to the planar sensing mechanism, the design permits a high areal density of sensing spots. In the design, absence of holes that facilitate resonant transmission of light, allows an easy-to-implement fabrication procedure and relative insensitivity to fabrication errors. Theoretical and experimental results agree well. An equivalent long-term RI noise of 6.3 × 10 -6 is obtained by using an 8 mW He-Ne laser, compared to a shot-noise limited theoretical sensitivity of 5.61 × 10-9. The device features full benefits of grating-coupled plasmon resonance, such as enhancement of sensitivity for non-zero azimuthal angle of incidence. Further sensitivity enhancement using balanced detection and optimal plasmon coupling conditions are discussed. © 2011 The Royal Society of Chemistry.en_US
dc.identifier.doi10.1039/c0lc00081gen_US
dc.identifier.eissn1473-0189
dc.identifier.issn1473-0197
dc.identifier.urihttp://hdl.handle.net/11693/22046
dc.language.isoEnglishen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.isversionofhttp://dx.doi.org/10.1039/c0lc00081gen_US
dc.source.titleLab on a Chipen_US
dc.titleGrating coupler integrated photodiodes for plasmon resonance based sensingen_US
dc.typeArticleen_US

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