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Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration
A new plasmonic configuration is proposed for application in a sensor and demonstrated for the detection of variations in the bulk refractive index of solutions. The configuration consists of monitoring two diffracted orders resulting from the interaction of a TM-polarized optical beam incident on a...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919053/ https://www.ncbi.nlm.nih.gov/pubmed/36772228 http://dx.doi.org/10.3390/s23031188 |
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author | Laffont, Emilie Crespo-Monteiro, Nicolas Valour, Arnaud Berini, Pierre Jourlin, Yves |
author_facet | Laffont, Emilie Crespo-Monteiro, Nicolas Valour, Arnaud Berini, Pierre Jourlin, Yves |
author_sort | Laffont, Emilie |
collection | PubMed |
description | A new plasmonic configuration is proposed for application in a sensor and demonstrated for the detection of variations in the bulk refractive index of solutions. The configuration consists of monitoring two diffracted orders resulting from the interaction of a TM-polarized optical beam incident on a grating coupler, operating based on an effect termed the “optical switch”. The two monitored diffracted orders enable differential measurements which cancel the drift and perturbations common to both, leading to an improved detection limit, as demonstrated experimentally. The measured switch pattern associated with the grating coupler is in good agreement with theory. Bulk sensing is demonstrated under intensity interrogation via the sequential injection of solutions comprised of glycerol in water into a fluidic cell. A limit of detection of about [Formula: see text] RIU was achieved. The optical switch configuration is easy to implement and is cost-effective, yielding a highly promising approach for the sensing and the real-time detection of biological species. |
format | Online Article Text |
id | pubmed-9919053 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-99190532023-02-12 Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration Laffont, Emilie Crespo-Monteiro, Nicolas Valour, Arnaud Berini, Pierre Jourlin, Yves Sensors (Basel) Article A new plasmonic configuration is proposed for application in a sensor and demonstrated for the detection of variations in the bulk refractive index of solutions. The configuration consists of monitoring two diffracted orders resulting from the interaction of a TM-polarized optical beam incident on a grating coupler, operating based on an effect termed the “optical switch”. The two monitored diffracted orders enable differential measurements which cancel the drift and perturbations common to both, leading to an improved detection limit, as demonstrated experimentally. The measured switch pattern associated with the grating coupler is in good agreement with theory. Bulk sensing is demonstrated under intensity interrogation via the sequential injection of solutions comprised of glycerol in water into a fluidic cell. A limit of detection of about [Formula: see text] RIU was achieved. The optical switch configuration is easy to implement and is cost-effective, yielding a highly promising approach for the sensing and the real-time detection of biological species. MDPI 2023-01-20 /pmc/articles/PMC9919053/ /pubmed/36772228 http://dx.doi.org/10.3390/s23031188 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Laffont, Emilie Crespo-Monteiro, Nicolas Valour, Arnaud Berini, Pierre Jourlin, Yves Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration |
title | Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration |
title_full | Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration |
title_fullStr | Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration |
title_full_unstemmed | Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration |
title_short | Differential Sensing with Replicated Plasmonic Gratings Interrogated in the Optical Switch Configuration |
title_sort | differential sensing with replicated plasmonic gratings interrogated in the optical switch configuration |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919053/ https://www.ncbi.nlm.nih.gov/pubmed/36772228 http://dx.doi.org/10.3390/s23031188 |
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