Photonic thermal sensor by phase interrogation around the critical coupling in hybrid metal-dielectric photonic structures

Théo Girerd; Lydie Ferrier; Lotfi Berguiga; Fabien Mandorlo; Taha Benyattou; Cécile Jamois; Xavier Letartre

doi:10.1117/12.2647241

17 March 2023 Photonic thermal sensor by phase interrogation around the critical coupling in hybrid metal-dielectric photonic structures

Théo Girerd, Lydie Ferrier, Lotfi Berguiga, Fabien Mandorlo, Taha Benyattou, Cécile Jamois, Xavier Letartre

Author Affiliations +

Proceedings Volume PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; PC1243108 (2023) https://doi.org/10.1117/12.2647241
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

In this study we will design photonic structures whose spectral properties are particularly sensitive to the environmental modifications, and we will present measurement system that allows to detect these small variations. For this purpose, we will focus on the phase at the reflection on periodic structures, in particular for the critical coupling points for which the phase variation is abrupt. The measurement method that we develop consists in an original holographic interferometric setup based on wavefront shaping that allow a very stable phase measurement.The fabrication of a temperature sensor based on these two principles has allowed us to experimentally reach phase sensitivities up to 39°/°C.

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Théo Girerd, Lydie Ferrier, Lotfi Berguiga, Fabien Mandorlo, Taha Benyattou, Cécile Jamois, and Xavier Letartre "Photonic thermal sensor by phase interrogation around the critical coupling in hybrid metal-dielectric photonic structures", Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC1243108 (17 March 2023); https://doi.org/10.1117/12.2647241

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