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Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes
We report a new scheme of realizing terahertz fingerprint detection with ultrahigh sensitivity. Instead of using the direct absorption of terahertz through a bare sample in the regular transmission scheme, a cavity mode resonating at the characteristic frequency of the sample is used and due to the...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5640676/ https://www.ncbi.nlm.nih.gov/pubmed/29030591 http://dx.doi.org/10.1038/s41598-017-13612-9 |
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author | Shi, Xiaomei Han, Zhanghua |
author_facet | Shi, Xiaomei Han, Zhanghua |
author_sort | Shi, Xiaomei |
collection | PubMed |
description | We report a new scheme of realizing terahertz fingerprint detection with ultrahigh sensitivity. Instead of using the direct absorption of terahertz through a bare sample in the regular transmission scheme, a cavity mode resonating at the characteristic frequency of the sample is used and due to the high dependence of the cavity mode transmission on the material loss, an amplified transmission decaying is observed when the sample is loaded into the cavity. Furthermore, this scheme retains the feature of substance identification. A one-dimensional photonic crystal cavity is used as the example for the detection of α-lactose and an efficient detection of 10 nm α-lactose can be achieved, which corresponds to 1/57000 of the free space wavelength at the characteristic frequency of 0.529 THz, exhibiting a sensitivity over 400 times higher than the regular transmission method. |
format | Online Article Text |
id | pubmed-5640676 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56406762017-10-18 Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes Shi, Xiaomei Han, Zhanghua Sci Rep Article We report a new scheme of realizing terahertz fingerprint detection with ultrahigh sensitivity. Instead of using the direct absorption of terahertz through a bare sample in the regular transmission scheme, a cavity mode resonating at the characteristic frequency of the sample is used and due to the high dependence of the cavity mode transmission on the material loss, an amplified transmission decaying is observed when the sample is loaded into the cavity. Furthermore, this scheme retains the feature of substance identification. A one-dimensional photonic crystal cavity is used as the example for the detection of α-lactose and an efficient detection of 10 nm α-lactose can be achieved, which corresponds to 1/57000 of the free space wavelength at the characteristic frequency of 0.529 THz, exhibiting a sensitivity over 400 times higher than the regular transmission method. Nature Publishing Group UK 2017-10-13 /pmc/articles/PMC5640676/ /pubmed/29030591 http://dx.doi.org/10.1038/s41598-017-13612-9 Text en © The Author(s) 2017 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 Shi, Xiaomei Han, Zhanghua Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
title | Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
title_full | Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
title_fullStr | Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
title_full_unstemmed | Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
title_short | Enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
title_sort | enhanced terahertz fingerprint detection with ultrahigh sensitivity using the cavity defect modes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5640676/ https://www.ncbi.nlm.nih.gov/pubmed/29030591 http://dx.doi.org/10.1038/s41598-017-13612-9 |
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