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Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications

The sensitivity of traditional diffraction grating sensors is limited by the spatial resolution of the measurement setup. Thus, a large space is required to improve sensor performance. Here, we demonstrate a compact hexagonal photonic crystal (PhC) optical sensor with high sensitivity. PhCs are able...

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Detalles Bibliográficos
Autores principales: Liao, Yu-Yang, Chen, Yung-Tsan, Chen, Chien-Chun, Huang, Jian-Jang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5951433/
https://www.ncbi.nlm.nih.gov/pubmed/29614036
http://dx.doi.org/10.3390/ma11040549
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author Liao, Yu-Yang
Chen, Yung-Tsan
Chen, Chien-Chun
Huang, Jian-Jang
author_facet Liao, Yu-Yang
Chen, Yung-Tsan
Chen, Chien-Chun
Huang, Jian-Jang
author_sort Liao, Yu-Yang
collection PubMed
description The sensitivity of traditional diffraction grating sensors is limited by the spatial resolution of the measurement setup. Thus, a large space is required to improve sensor performance. Here, we demonstrate a compact hexagonal photonic crystal (PhC) optical sensor with high sensitivity. PhCs are able to diffract optical beams to various angles in azimuthal space. The critical wavelength that satisfies the phase matching or becomes evanescent was used to benchmark the refractive index of a target analyte applied on a PhC sensor. Using a glucose solution as an example, our sensor demonstrated very high sensitivity and a low limit of detection. This shows that the diffraction mechanism of hexagonal photonic crystals can be used for sensors when compact size is a concern.
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spelling pubmed-59514332018-05-15 Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications Liao, Yu-Yang Chen, Yung-Tsan Chen, Chien-Chun Huang, Jian-Jang Materials (Basel) Article The sensitivity of traditional diffraction grating sensors is limited by the spatial resolution of the measurement setup. Thus, a large space is required to improve sensor performance. Here, we demonstrate a compact hexagonal photonic crystal (PhC) optical sensor with high sensitivity. PhCs are able to diffract optical beams to various angles in azimuthal space. The critical wavelength that satisfies the phase matching or becomes evanescent was used to benchmark the refractive index of a target analyte applied on a PhC sensor. Using a glucose solution as an example, our sensor demonstrated very high sensitivity and a low limit of detection. This shows that the diffraction mechanism of hexagonal photonic crystals can be used for sensors when compact size is a concern. MDPI 2018-04-03 /pmc/articles/PMC5951433/ /pubmed/29614036 http://dx.doi.org/10.3390/ma11040549 Text en © 2018 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liao, Yu-Yang
Chen, Yung-Tsan
Chen, Chien-Chun
Huang, Jian-Jang
Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications
title Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications
title_full Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications
title_fullStr Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications
title_full_unstemmed Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications
title_short Evanescent Properties of Optical Diffraction from 2-Dimensional Hexagonal Photonic Crystals and Their Sensor Applications
title_sort evanescent properties of optical diffraction from 2-dimensional hexagonal photonic crystals and their sensor applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5951433/
https://www.ncbi.nlm.nih.gov/pubmed/29614036
http://dx.doi.org/10.3390/ma11040549
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