Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance

Abstract In this paper, we propose a method of designing ultra-wideband single-layer metasurfaces for cross-polarization conversion, via the introduction of Fano resonances. By adding sub-branches onto the unit cell structure, the induced surface currents are disturbed, leading to coexistence of bot...

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Autores principales:	Zhongtao Zhang, Jiafu Wang, Xinmin Fu, Yuxiang Jia, Hongya Chen, Mingde Feng, Ruichao Zhu, Shaobo Qu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1660d44df6c44ca6acaec9e56f39f84f
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spelling	oai:doaj.org-article:1660d44df6c44ca6acaec9e56f39f84f2021-12-02T14:12:10ZSingle-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance10.1038/s41598-020-79945-02045-2322https://doaj.org/article/1660d44df6c44ca6acaec9e56f39f84f2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79945-0https://doaj.org/toc/2045-2322Abstract In this paper, we propose a method of designing ultra-wideband single-layer metasurfaces for cross-polarization conversion, via the introduction of Fano resonances. By adding sub-branches onto the unit cell structure, the induced surface currents are disturbed, leading to coexistence of both bright and dark modes at higher frequencies. Due to the strong interaction between the two modes, Fano resonance can be produced. In this way, five resonances in all are produced by the single-layer metasurface. The first four are conventional and are generated by electric and magnetic resonances, whereas the fifth one is caused by Fano resonance, which further extends the bandwidth. A prototype was designed, fabricated and measured to verify this method. Both the simulated and measured results show that a 1:4.4 bandwidth can be achieved for both x- and y-polarized waves, with almost all polarization conversion ratio (PCR) above 90%. This method provides an effective alternative to metasurface bandwidth extension and can also be extended to higher bands such as THz and infrared frequencies.Zhongtao ZhangJiafu WangXinmin FuYuxiang JiaHongya ChenMingde FengRuichao ZhuShaobo QuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhongtao Zhang Jiafu Wang Xinmin Fu Yuxiang Jia Hongya Chen Mingde Feng Ruichao Zhu Shaobo Qu Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance
description	Abstract In this paper, we propose a method of designing ultra-wideband single-layer metasurfaces for cross-polarization conversion, via the introduction of Fano resonances. By adding sub-branches onto the unit cell structure, the induced surface currents are disturbed, leading to coexistence of both bright and dark modes at higher frequencies. Due to the strong interaction between the two modes, Fano resonance can be produced. In this way, five resonances in all are produced by the single-layer metasurface. The first four are conventional and are generated by electric and magnetic resonances, whereas the fifth one is caused by Fano resonance, which further extends the bandwidth. A prototype was designed, fabricated and measured to verify this method. Both the simulated and measured results show that a 1:4.4 bandwidth can be achieved for both x- and y-polarized waves, with almost all polarization conversion ratio (PCR) above 90%. This method provides an effective alternative to metasurface bandwidth extension and can also be extended to higher bands such as THz and infrared frequencies.
format	article
author	Zhongtao Zhang Jiafu Wang Xinmin Fu Yuxiang Jia Hongya Chen Mingde Feng Ruichao Zhu Shaobo Qu
author_facet	Zhongtao Zhang Jiafu Wang Xinmin Fu Yuxiang Jia Hongya Chen Mingde Feng Ruichao Zhu Shaobo Qu
author_sort	Zhongtao Zhang
title	Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance
title_short	Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance
title_full	Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance
title_fullStr	Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance
title_full_unstemmed	Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance
title_sort	single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via fano resonance
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1660d44df6c44ca6acaec9e56f39f84f
work_keys_str_mv	AT zhongtaozhang singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT jiafuwang singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT xinminfu singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT yuxiangjia singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT hongyachen singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT mingdefeng singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT ruichaozhu singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance AT shaoboqu singlelayermetasurfaceforultrawidebandpolarizationconversionbandwidthextensionviafanoresonance
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Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance

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