Enhancement and control of surface plasmon resonance sensitivity using grating in conical mounting configuration

In this work we propose a method to enhance and control the angular sensitivity of a grating coupled surface plasmon resonance (GCSPR) sensor. We lighted a silver grating, mounted in conical configuration, with a laser source and we measured the transmittance of the grating as a function of the azim...

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Bibliographic Details
Published in:Optics letters 2015-01, Vol.40 (2), p.221-224
Main Authors: Perino, M, Pasqualotto, E, Scaramuzza, M, De Toni, A, Paccagnella, A
Format: Article
Language:English
Subjects:
Control surfaces
Diffraction gratings
Gratings (spectra)
Lasers
Mounting
Plasmons
Sensors
Surface Plasmon Resonance - instrumentation
Surface Plasmon Resonance - methods
Transmittance
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Summary:In this work we propose a method to enhance and control the angular sensitivity of a grating coupled surface plasmon resonance (GCSPR) sensor. We lighted a silver grating, mounted in conical configuration, with a laser source and we measured the transmittance of the grating as a function of the azimuthal angle. To evaluate the sensitivity, grating surface was functionalized with four different alkanethiol self assembled monolayers (SAM) and the correspondent azimuthal transmittance peak shifts were measured. The sensitivity control was performed by simply change the light incident angle. This method offers the possibility to design dynamic GCSPR sensor benches that can be used to amplify the SPR angle shift at any step of a biological detection process.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.40.000221