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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...

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Autores principales: Zhao, Jiayu, Chu, Wei, Guo, Lanjun, Wang, Zhi, Yang, Jing, Liu, Weiwei, Cheng, Ya, Xu, Zhizhan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
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.
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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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