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Proceedings Paper

Novel compact architecture for high-resolution sensing with plasmonic gratings in conical mounting
Author(s): Gianluca Ruffato; Elisabetta Pasqualotto; Agnese Sonato; Gabriele Zacco; Davide Silvestri; Monica Dettin; Margherita Morpurgo; Alessandro De Toni; Filippo Romanato
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Paper Abstract

A novel compact architecture implementing grating-coupled surface plasmon resonance (GCSPR) based on polarization modulation in conical mounting is presented. In this system a plasmonic grating is azimuthally rotated in order to support the excitation of high-sensitivity surface plasmon polaritons (SPPs). At SPP resonance, a scan of the incident polarization is performed before and after the binding event and the phase term of the output trend is exploited as sensing parameter. The mechanical complexity of the SPR system is significantly reduced and a resolution down to 10-7 refractive index units is assured. In this work a numerical study of the polarization-based grating-coupled SPR technique is performed and analyzed with Chandezon’s method. Therefore an experimental test on an assembled prototype is presented and applied to the detection of binding events on the grating surface (avidin/biotin reaction, DNA/PNA probes).

Paper Details

Date Published: 29 May 2013
PDF: 11 pages
Proc. SPIE 8722, Fiber Optic Sensors and Applications X, 87220U (29 May 2013); doi: 10.1117/12.2014272
Show Author Affiliations
Gianluca Ruffato, Univ. degli Studi di Padova (Italy)
Veneto Nanotech s.c.p.a. (Italy)
Istituto Nazionale per la Fisica della Materia, CNR (Italy)
Elisabetta Pasqualotto, Univ. degli Studi di Padova (Italy)
Agnese Sonato, Univ. degli Studi di Padova (Italy)
Veneto Nanotech s.c.p.a. (Italy)
Gabriele Zacco, Veneto Nanotech s.c.p.a. (Italy)
Istituto Nazionale per la Fisica della Materia, CNR (Italy)
Davide Silvestri, Univ. degli Studi di Padova (Italy)
Monica Dettin, Univ. degli Studi di Padova (Italy)
Margherita Morpurgo, Univ. degli Studi di Padova (Italy)
Alessandro De Toni, Univ. degli Studi di Padova (Italy)
Filippo Romanato, Univ. degli Studi di Padova (Italy)
Veneto Nanotech s.c.p.a. (Italy)
Istituto Nazionale per la Fisica della Materia, CNR (Italy)


Published in SPIE Proceedings Vol. 8722:
Fiber Optic Sensors and Applications X
Eric Udd; Gary Pickrell; Henry H. Du; Jerry J. Benterou; Xudong Fan; Alexis Mendez; Stephen J. Mihailov; Anbo Wang; Hai Xiao, Editor(s)

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