Isotropic Backward Waves Supported by a Spiral Array Metasurface

A planar metallic metasurface formed of spiral elements is shown to support an isotropic backward wave over a narrow band of microwave frequencies. The magnetic field of this left-handed mode is mapped experimentally using a near-field scanning technique, allowing the anti-parallel group and phase v...

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Autores principales: Tremain, Ben, Hooper, Ian R., Sambles, J. Roy, Hibbins, Alastair P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940691/
https://www.ncbi.nlm.nih.gov/pubmed/29740039
http://dx.doi.org/10.1038/s41598-018-25469-7
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author Tremain, Ben
Hooper, Ian R.
Sambles, J. Roy
Hibbins, Alastair P.
author_facet Tremain, Ben
Hooper, Ian R.
Sambles, J. Roy
Hibbins, Alastair P.
author_sort Tremain, Ben
collection PubMed
description A planar metallic metasurface formed of spiral elements is shown to support an isotropic backward wave over a narrow band of microwave frequencies. The magnetic field of this left-handed mode is mapped experimentally using a near-field scanning technique, allowing the anti-parallel group and phase velocities to be directly visualised. The corresponding dispersion relation and isofrequency contours are obtained through Fourier transformation of the field images.
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spelling pubmed-59406912018-05-11 Isotropic Backward Waves Supported by a Spiral Array Metasurface Tremain, Ben Hooper, Ian R. Sambles, J. Roy Hibbins, Alastair P. Sci Rep Article A planar metallic metasurface formed of spiral elements is shown to support an isotropic backward wave over a narrow band of microwave frequencies. The magnetic field of this left-handed mode is mapped experimentally using a near-field scanning technique, allowing the anti-parallel group and phase velocities to be directly visualised. The corresponding dispersion relation and isofrequency contours are obtained through Fourier transformation of the field images. Nature Publishing Group UK 2018-05-08 /pmc/articles/PMC5940691/ /pubmed/29740039 http://dx.doi.org/10.1038/s41598-018-25469-7 Text en © The Author(s) 2018 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
Tremain, Ben
Hooper, Ian R.
Sambles, J. Roy
Hibbins, Alastair P.
Isotropic Backward Waves Supported by a Spiral Array Metasurface
title Isotropic Backward Waves Supported by a Spiral Array Metasurface
title_full Isotropic Backward Waves Supported by a Spiral Array Metasurface
title_fullStr Isotropic Backward Waves Supported by a Spiral Array Metasurface
title_full_unstemmed Isotropic Backward Waves Supported by a Spiral Array Metasurface
title_short Isotropic Backward Waves Supported by a Spiral Array Metasurface
title_sort isotropic backward waves supported by a spiral array metasurface
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940691/
https://www.ncbi.nlm.nih.gov/pubmed/29740039
http://dx.doi.org/10.1038/s41598-018-25469-7
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AT hibbinsalastairp isotropicbackwardwavessupportedbyaspiralarraymetasurface

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