Isotropic Backward Waves Supported by a Spiral Array Metasurface

Abstract 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 an...

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Autores principales:	Ben Tremain, Ian R. Hooper, J. Roy Sambles, Alastair P. Hibbins
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/41e5163cde5d4ceba4329a9e7c560025
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spelling	oai:doaj.org-article:41e5163cde5d4ceba4329a9e7c5600252021-12-02T16:08:25ZIsotropic Backward Waves Supported by a Spiral Array Metasurface10.1038/s41598-018-25469-72045-2322https://doaj.org/article/41e5163cde5d4ceba4329a9e7c5600252018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25469-7https://doaj.org/toc/2045-2322Abstract 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.Ben TremainIan R. HooperJ. Roy SamblesAlastair P. HibbinsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-6 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ben Tremain Ian R. Hooper J. Roy Sambles Alastair P. Hibbins Isotropic Backward Waves Supported by a Spiral Array Metasurface
description	Abstract 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.
format	article
author	Ben Tremain Ian R. Hooper J. Roy Sambles Alastair P. Hibbins
author_facet	Ben Tremain Ian R. Hooper J. Roy Sambles Alastair P. Hibbins
author_sort	Ben Tremain
title	Isotropic Backward Waves Supported by a Spiral Array Metasurface
title_short	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_sort	isotropic backward waves supported by a spiral array metasurface
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/41e5163cde5d4ceba4329a9e7c560025
work_keys_str_mv	AT bentremain isotropicbackwardwavessupportedbyaspiralarraymetasurface AT ianrhooper isotropicbackwardwavessupportedbyaspiralarraymetasurface AT jroysambles isotropicbackwardwavessupportedbyaspiralarraymetasurface AT alastairphibbins isotropicbackwardwavessupportedbyaspiralarraymetasurface
_version_	1718384462989885440

Isotropic Backward Waves Supported by a Spiral Array Metasurface

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