Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs

We report here a compact vapor sensor based on polymer coated two-dimensional (2D) defect-free photonic crystal slabs (PCS). The sensing mechanism is based on the resonance spectral shift associated with the Fano resonance mode in the PCS due to the vapor molecule adsorption and desorption induced c...

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Autores principales: Liu, Yonghao, Wang, Shuling, Biswas, Priyanka, Palit, Prithviraj, Zhou, Weidong, Sun, Yuze
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6414601/
https://www.ncbi.nlm.nih.gov/pubmed/30862849
http://dx.doi.org/10.1038/s41598-019-41048-w
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author Liu, Yonghao
Wang, Shuling
Biswas, Priyanka
Palit, Prithviraj
Zhou, Weidong
Sun, Yuze
author_facet Liu, Yonghao
Wang, Shuling
Biswas, Priyanka
Palit, Prithviraj
Zhou, Weidong
Sun, Yuze
author_sort Liu, Yonghao
collection PubMed
description We report here a compact vapor sensor based on polymer coated two-dimensional (2D) defect-free photonic crystal slabs (PCS). The sensing mechanism is based on the resonance spectral shift associated with the Fano resonance mode in the PCS due to the vapor molecule adsorption and desorption induced changes in both polymer thickness and polymer refractive index (RI). Sensitivity due to RI and thickness change were theoretically investigated respectively. With three different thicknesses of OV-101 polymer coating, sensitivity and response time were experimentally evaluated for hexane and ethanol vapors. The polymer demonstrated roughly four times higher sensitivity towards the hexane vapor than ethanol vapor. The PCS sensor with thicker polymer coating showed higher sensitivity to both hexane and ethanol vapors but exhibiting longer response time.
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spelling pubmed-64146012019-03-14 Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs Liu, Yonghao Wang, Shuling Biswas, Priyanka Palit, Prithviraj Zhou, Weidong Sun, Yuze Sci Rep Article We report here a compact vapor sensor based on polymer coated two-dimensional (2D) defect-free photonic crystal slabs (PCS). The sensing mechanism is based on the resonance spectral shift associated with the Fano resonance mode in the PCS due to the vapor molecule adsorption and desorption induced changes in both polymer thickness and polymer refractive index (RI). Sensitivity due to RI and thickness change were theoretically investigated respectively. With three different thicknesses of OV-101 polymer coating, sensitivity and response time were experimentally evaluated for hexane and ethanol vapors. The polymer demonstrated roughly four times higher sensitivity towards the hexane vapor than ethanol vapor. The PCS sensor with thicker polymer coating showed higher sensitivity to both hexane and ethanol vapors but exhibiting longer response time. Nature Publishing Group UK 2019-03-12 /pmc/articles/PMC6414601/ /pubmed/30862849 http://dx.doi.org/10.1038/s41598-019-41048-w Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liu, Yonghao
Wang, Shuling
Biswas, Priyanka
Palit, Prithviraj
Zhou, Weidong
Sun, Yuze
Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
title Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
title_full Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
title_fullStr Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
title_full_unstemmed Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
title_short Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
title_sort optofluidic vapor sensing with free-space coupled 2d photonic crystal slabs
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6414601/
https://www.ncbi.nlm.nih.gov/pubmed/30862849
http://dx.doi.org/10.1038/s41598-019-41048-w
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