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Planar Holographic Metasurfaces for Terahertz Focusing

Scientists and laymen alike have always been fascinated by the ability of lenses and mirrors to control light. Now, with the advent of metamaterials and their two-dimensional counterpart metasurfaces, such components can be miniaturized and designed with additional functionalities, holding promise f...

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Autores principales: Kuznetsov, Sergei A., Astafev, Mikhail A., Beruete, Miguel, Navarro-Cía, Miguel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4291574/
https://www.ncbi.nlm.nih.gov/pubmed/25583565
http://dx.doi.org/10.1038/srep07738
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author Kuznetsov, Sergei A.
Astafev, Mikhail A.
Beruete, Miguel
Navarro-Cía, Miguel
author_facet Kuznetsov, Sergei A.
Astafev, Mikhail A.
Beruete, Miguel
Navarro-Cía, Miguel
author_sort Kuznetsov, Sergei A.
collection PubMed
description Scientists and laymen alike have always been fascinated by the ability of lenses and mirrors to control light. Now, with the advent of metamaterials and their two-dimensional counterpart metasurfaces, such components can be miniaturized and designed with additional functionalities, holding promise for system integration. To demonstrate this potential, here ultrathin reflection metasurfaces (also called metamirrors) designed for focusing terahertz radiation into a single spot and four spaced spots are proposed and experimentally investigated at the frequency of 0.35 THz. Each metasurface is designed using a computer-generated spatial distribution of the reflection phase. The phase variation within 360 deg is achieved via a topological morphing of the metasurface pattern from metallic patches to U-shaped and split-ring resonator elements, whose spectral response is derived from full-wave electromagnetic simulations. The proposed approach demonstrates a high-performance solution for creating low-cost and lightweight beam-shaping and beam-focusing devices for the terahertz band.
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spelling pubmed-42915742015-01-16 Planar Holographic Metasurfaces for Terahertz Focusing Kuznetsov, Sergei A. Astafev, Mikhail A. Beruete, Miguel Navarro-Cía, Miguel Sci Rep Article Scientists and laymen alike have always been fascinated by the ability of lenses and mirrors to control light. Now, with the advent of metamaterials and their two-dimensional counterpart metasurfaces, such components can be miniaturized and designed with additional functionalities, holding promise for system integration. To demonstrate this potential, here ultrathin reflection metasurfaces (also called metamirrors) designed for focusing terahertz radiation into a single spot and four spaced spots are proposed and experimentally investigated at the frequency of 0.35 THz. Each metasurface is designed using a computer-generated spatial distribution of the reflection phase. The phase variation within 360 deg is achieved via a topological morphing of the metasurface pattern from metallic patches to U-shaped and split-ring resonator elements, whose spectral response is derived from full-wave electromagnetic simulations. The proposed approach demonstrates a high-performance solution for creating low-cost and lightweight beam-shaping and beam-focusing devices for the terahertz band. Nature Publishing Group 2015-01-13 /pmc/articles/PMC4291574/ /pubmed/25583565 http://dx.doi.org/10.1038/srep07738 Text en Copyright © 2015, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 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 in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/
spellingShingle Article
Kuznetsov, Sergei A.
Astafev, Mikhail A.
Beruete, Miguel
Navarro-Cía, Miguel
Planar Holographic Metasurfaces for Terahertz Focusing
title Planar Holographic Metasurfaces for Terahertz Focusing
title_full Planar Holographic Metasurfaces for Terahertz Focusing
title_fullStr Planar Holographic Metasurfaces for Terahertz Focusing
title_full_unstemmed Planar Holographic Metasurfaces for Terahertz Focusing
title_short Planar Holographic Metasurfaces for Terahertz Focusing
title_sort planar holographic metasurfaces for terahertz focusing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4291574/
https://www.ncbi.nlm.nih.gov/pubmed/25583565
http://dx.doi.org/10.1038/srep07738
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