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Proceedings Paper

Integrated angular tracking and plasmonic membrane surfaces for a point of a care refractive index sensor
Author(s): Marie-Claude Bay; Rolf Eckert; Eric Grenet; Ross P. Stanley; Edo Franzi; Harry Heinzelmann; Cenk I. Ozdemir; Hatice Altug; L. Andrea Dunbar
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Paper Abstract

We present an optical system which integrates a plasmonic sensing surface and an angular tracking system to enable a compact refractive index measurement. A refractive index change at the surface of the sensing membrane causes a change in the angle at which monochromatic light is transmitted through the membrane. This transmission angle is measured by the angular tracking system. We show good theoretical and experimental agreement of the transmission of the plasmonic sensing surface at different angular illumination of the membranes. Using this compact optical setup the embedded angular tracking system has an accuracy of <10-4 deg. This corresponds to a sensitivity <10-5 refractive index units. Finally we demonstrate this measurement technique using different concentrations of saline solution.

Paper Details

Date Published: 7 March 2016
PDF: 10 pages
Proc. SPIE 9750, Integrated Optics: Devices, Materials, and Technologies XX, 97500E (7 March 2016); doi: 10.1117/12.2214271
Show Author Affiliations
Marie-Claude Bay, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Rolf Eckert, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Eric Grenet, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Ross P. Stanley, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Edo Franzi, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Harry Heinzelmann, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Cenk I. Ozdemir, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Hatice Altug, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
L. Andrea Dunbar, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)


Published in SPIE Proceedings Vol. 9750:
Integrated Optics: Devices, Materials, and Technologies XX
Jean-Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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