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Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control

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Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control

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dc.contributor.author Romanato, Filippo
dc.contributor.author Lee, Kwang Hong
dc.contributor.author Kang, Husen Kartasasmita
dc.contributor.author Ruffato, Gianluca
dc.contributor.author Wong, Chee Cheong
dc.date.accessioned 2010-03-12T02:57:35Z
dc.date.available 2010-03-12T02:57:35Z
dc.date.copyright 2009
dc.date.issued 2010-03-12T02:57:35Z
dc.identifier.citation Romanato, F., Lee, K. H., Kang, H. K., Ruffato, G. & Wong, C. C. (2009). Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control. Optics Express, 17(14), 12145-12154.
dc.identifier.issn 1094-4087
dc.identifier.uri http://hdl.handle.net/10220/6202
dc.description.abstract We present a method for improving the sensing capability of grating coupled surface plasmon resonance (GCSPR) sensors. The grating is rotated azimuthally (φ) until the excitation of double surface plasmon polaritions (SPPs) by a single wavelength is possible. Close to this condition, further tuning of the incident wavelength will merge the double SPPs into a multi-SPP resonance which is angularly broad but spectrally sharp. This is the condition where the momentum vector of the propagating SPP is perpendicular to the incident light momentum. We demonstrate this sensitivity enhancement on a Au grating surface using a dodecanethiol (C12) self-assembled monolayer (SAM). Using this method, a shift in resonance angle as large as 3° can be observed. The simulated sensitivity of this method shows that a sensitivity up to 800°/RIU is achievable, which is one order of magnitude greater than that in a conventional fixed grating (φ = 0°) as well as the prism-coupled Kretschmann configuration.
dc.format.extent 10 p.
dc.language.iso en
dc.relation.ispartofseries Optics express
dc.subject DRNTU::Engineering::Materials::Plasma treatment.
dc.title Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1364/OE.17.012145
dc.description.version Accepted version
dc.identifier.rims 144239

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