Agile Plasmo-Photonic Interferometric Sensor With Liquid Dielectric Loading for Temperature Sensing and Thermo-Optic Coefficient Measurements

IEEE Sensors Journal, vol. 26, pp. 3679–3686

Abstract

This work presents an integrated plasmo-photonic interferometric sensor providing environmental temperature and thermo-optic coefficient measurement capabilities. By exploiting extreme light field concentration on the plasmonic metal stripe, the sensor employs a liquid dielectric layer deposited on the plasmonic sensing area for refractive index changes versus temperature. Experimental characterization was conducted with four different liquids, achieving a record temperature sensitivity of +23.86 nm/°C for a 70% ethanol-water solution. Additionally, by leveraging the sensor’s high sensitivity, the thermo-optic coefficient of an unknown liquid was determined with a relative error of 13.1%.

Authors 14

1. Lamprini Damakoudi

   Aristotle University of Thessaloniki

   Affiliation as printed

   Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece

2. Stelios Simos
   Affiliation as printed

   Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Thessaloniki, Greece

3. Dimosthenis Spasopoulos
   Affiliation as printed

   Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Thessaloniki, Greece

4. Konstantinos Fotiadis
   Affiliation as printed

   Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Thessaloniki, Greece

5. E. Chatzianagnostou
   Affiliation as printed

   Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Thessaloniki, Greece

6. Omkar Bhalerao Aachen AMO GmbH

   AMO (Germany)

   Affiliation as printed

   AMO GmbH, Aachen, Germany

7. Stephan Suckow Aachen AMO GmbH

   AMO (Germany)

   Affiliation as printed

   AMO GmbH, Aachen, Germany

8. Max C. Lemme Aachen AMO GmbH

   AMO (Germany)

   Affiliation as printed

   AMO GmbH, Aachen, Germany

9. Laurent Markey

   Centre National de la Recherche Scientifique · Laboratoire Interdisciplinaire Carnot de Bourgogne

   Affiliation as printed

   Laboratoire Interdisciplinaire Carnot de Bourgogne, CNRS UMR 6303, Université Bourgogne Europe, Dijon, France

10. Dimitris V. Bellas

    University of Ioannina

    Affiliation as printed

    Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece

11. Eleftheria Lampadariou

    University of Ioannina

    Affiliation as printed

    Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece

12. Elefterios Lidorikis

    University of Ioannina

    Affiliation as printed

    Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece

13. Nikos Pleros
    Affiliation as printed

    Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Thessaloniki, Greece

14. Konstantinos Vyrsokinos

    Aristotle University of Thessaloniki

    Affiliation as printed

    Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece