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Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air
Terahertz (THz) imaging provides cutting edge technique in biology, medical sciences and non-destructive evaluation. However, due to the long wavelength of the THz wave, the obtained resolution of THz imaging is normally a few hundred microns and is much lower than that of the traditional optical im...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3900924/ https://www.ncbi.nlm.nih.gov/pubmed/24457525 http://dx.doi.org/10.1038/srep03880 |
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author | Zhao, Jiayu Chu, Wei Guo, Lanjun Wang, Zhi Yang, Jing Liu, Weiwei Cheng, Ya Xu, Zhizhan |
author_facet | Zhao, Jiayu Chu, Wei Guo, Lanjun Wang, Zhi Yang, Jing Liu, Weiwei Cheng, Ya Xu, Zhizhan |
author_sort | Zhao, Jiayu |
collection | PubMed |
description | Terahertz (THz) imaging provides cutting edge technique in biology, medical sciences and non-destructive evaluation. However, due to the long wavelength of the THz wave, the obtained resolution of THz imaging is normally a few hundred microns and is much lower than that of the traditional optical imaging. We introduce a sub-wavelength resolution THz imaging technique which uses the THz radiation generated by a femtosecond laser filament in air as the probe. This method is based on the fact that the femtosecond laser filament forms a waveguide for the THz wave in air. The diameter of the THz beam, which propagates inside the filament, varies from 20 μm to 50 μm, which is significantly smaller than the wavelength of the THz wave. Using this highly spatially confined THz beam as the probe, THz imaging with resolution as high as 20 μm (~λ/38 at 0.4 THz) can be realized. |
format | Online Article Text |
id | pubmed-3900924 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-39009242014-01-24 Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air Zhao, Jiayu Chu, Wei Guo, Lanjun Wang, Zhi Yang, Jing Liu, Weiwei Cheng, Ya Xu, Zhizhan Sci Rep Article Terahertz (THz) imaging provides cutting edge technique in biology, medical sciences and non-destructive evaluation. However, due to the long wavelength of the THz wave, the obtained resolution of THz imaging is normally a few hundred microns and is much lower than that of the traditional optical imaging. We introduce a sub-wavelength resolution THz imaging technique which uses the THz radiation generated by a femtosecond laser filament in air as the probe. This method is based on the fact that the femtosecond laser filament forms a waveguide for the THz wave in air. The diameter of the THz beam, which propagates inside the filament, varies from 20 μm to 50 μm, which is significantly smaller than the wavelength of the THz wave. Using this highly spatially confined THz beam as the probe, THz imaging with resolution as high as 20 μm (~λ/38 at 0.4 THz) can be realized. Nature Publishing Group 2014-01-24 /pmc/articles/PMC3900924/ /pubmed/24457525 http://dx.doi.org/10.1038/srep03880 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareALike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ |
spellingShingle | Article Zhao, Jiayu Chu, Wei Guo, Lanjun Wang, Zhi Yang, Jing Liu, Weiwei Cheng, Ya Xu, Zhizhan Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
title | Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
title_full | Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
title_fullStr | Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
title_full_unstemmed | Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
title_short | Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
title_sort | terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3900924/ https://www.ncbi.nlm.nih.gov/pubmed/24457525 http://dx.doi.org/10.1038/srep03880 |
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