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

IEEE Sensors Journal 2026 Open access

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Authors: Lamprini Damakoudi, Stelios Simos, Dimosthenis Spasopoulos, Konstantinos Fotiadis, E. Chatzianagnostou, Omkar Bhalerao, Stephan Suckow, Max C. Lemme, Laurent Markey, Dimitris V. Bellas, Eleftheria Lampadariou, Elefterios Lidorikis
+2 more N. Pleros, Konstantinos Vyrsokinos
DOI: 10.1109/jsen.2025.3648036
Cited by: 1
References: 44

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%.

Fields of Study & Subjects

Advanced Fiber Optic Sensors Plasmonic and Surface Plasmon Research Mechanical and Optical Resonators

Publication details

Journal / source
IEEE Sensors Journal
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Volume
26
Issue
3
Pages
3679–3686
Publication date
1 January 2026
Language
EN