A broadband terahertz ultrathin multi-focus lens

Ultrathin transmission metasurface devices are designed on the basis of the Yang-Gu amplitude-phase retrieval algorithm for focusing the terahertz (THz) radiation into four or nine spots with focal spacing of 2 or 3 mm at a frequency of 0.8 THz. The focal properties are experimentally investigated i...

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Autores principales: He, Jingwen, Ye, Jiasheng, Wang, Xinke, Kan, Qiang, Zhang, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4921809/
https://www.ncbi.nlm.nih.gov/pubmed/27346430
http://dx.doi.org/10.1038/srep28800
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author He, Jingwen
Ye, Jiasheng
Wang, Xinke
Kan, Qiang
Zhang, Yan
author_facet He, Jingwen
Ye, Jiasheng
Wang, Xinke
Kan, Qiang
Zhang, Yan
author_sort He, Jingwen
collection PubMed
description Ultrathin transmission metasurface devices are designed on the basis of the Yang-Gu amplitude-phase retrieval algorithm for focusing the terahertz (THz) radiation into four or nine spots with focal spacing of 2 or 3 mm at a frequency of 0.8 THz. The focal properties are experimentally investigated in detail, and the results agree well with the theoretical expectations. The designed THz multi-focus lens (TMFL) demonstrates a good focusing function over a broad frequency range from 0.3 to 1.1 THz. As a transmission-type device based on metasurface, the diffraction efficiency of the TMFL can be as high as 33.92% at the designed frequency. The imaging function of the TMFL is also demonstrated experimentally and clear images are obtained. The proposed method produces an ultrathin, low-cost, and broadband multi-focus lens for THz-band application
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spelling pubmed-49218092016-06-28 A broadband terahertz ultrathin multi-focus lens He, Jingwen Ye, Jiasheng Wang, Xinke Kan, Qiang Zhang, Yan Sci Rep Article Ultrathin transmission metasurface devices are designed on the basis of the Yang-Gu amplitude-phase retrieval algorithm for focusing the terahertz (THz) radiation into four or nine spots with focal spacing of 2 or 3 mm at a frequency of 0.8 THz. The focal properties are experimentally investigated in detail, and the results agree well with the theoretical expectations. The designed THz multi-focus lens (TMFL) demonstrates a good focusing function over a broad frequency range from 0.3 to 1.1 THz. As a transmission-type device based on metasurface, the diffraction efficiency of the TMFL can be as high as 33.92% at the designed frequency. The imaging function of the TMFL is also demonstrated experimentally and clear images are obtained. The proposed method produces an ultrathin, low-cost, and broadband multi-focus lens for THz-band application Nature Publishing Group 2016-06-27 /pmc/articles/PMC4921809/ /pubmed/27346430 http://dx.doi.org/10.1038/srep28800 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
He, Jingwen
Ye, Jiasheng
Wang, Xinke
Kan, Qiang
Zhang, Yan
A broadband terahertz ultrathin multi-focus lens
title A broadband terahertz ultrathin multi-focus lens
title_full A broadband terahertz ultrathin multi-focus lens
title_fullStr A broadband terahertz ultrathin multi-focus lens
title_full_unstemmed A broadband terahertz ultrathin multi-focus lens
title_short A broadband terahertz ultrathin multi-focus lens
title_sort broadband terahertz ultrathin multi-focus lens
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4921809/
https://www.ncbi.nlm.nih.gov/pubmed/27346430
http://dx.doi.org/10.1038/srep28800
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