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MDPI, Optics, 3(2), p. 193-199, 2021

DOI: 10.3390/opt2030018

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High Quality Factor Silicon Membrane Metasurface for Intensity-Based Refractive Index Sensing

Journal article published in 2021 by Andrea Tognazzi ORCID, Davide Rocco ORCID, Marco Gandolfi ORCID, Andrea Locatelli ORCID, Luca Carletti ORCID, Costantino De Angelis ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We propose a new sensing device based on all-optical nano-objects placed in a suspended periodic array. We demonstrate that the intensity-based sensing mechanism can measure environment refractive index change of the order of 1.8×10−6, which is close to record efficiencies in plasmonic devices.