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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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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. |
format | Online Article Text |
id | pubmed-5951433 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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