Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films

We study how to enhance the transverse magneto-optical Kerr effect (TMOKE) of ultra-thin magnetic dielectric films through the excitation of strong magnetic resonances on metasurface with a metal nanowire array stacked above a metal substrate with an ultra-thin magnetic dielectric film spacer. The p...

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Autores principales:	Jing Chen, Guohua Wu, Ping Gu, Yumei Tang, Chun Yang, Zhendong Yan, Chaojun Tang, Zhengqi Liu, Fan Gao, Pinggen Cai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	metasurface magnetic resonance strong coupling transverse magneto-optical Kerr effect Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/060d1d0454254b09b7d7a2eb729ee5de
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spelling	oai:doaj.org-article:060d1d0454254b09b7d7a2eb729ee5de2021-11-25T18:30:07ZTheoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films10.3390/nano111128252079-4991https://doaj.org/article/060d1d0454254b09b7d7a2eb729ee5de2021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2825https://doaj.org/toc/2079-4991We study how to enhance the transverse magneto-optical Kerr effect (TMOKE) of ultra-thin magnetic dielectric films through the excitation of strong magnetic resonances on metasurface with a metal nanowire array stacked above a metal substrate with an ultra-thin magnetic dielectric film spacer. The plasmonic hybridizations between the Au nanowires and substrate result in magnetic resonances. The periodic arrangement of the Au nanowires can excite propagating surface plasmon polaritons (SPPs) on the metal surface. When the SPPs and the magnetic resonances hybridize, they can strongly couple to form two strong magnetic resonances, which are explained by a coupled oscillator model. Importantly, benefitting from the strong magnetic resonances, we can achieve a large TMOKE signal up to 26% in the ultra-thin magnetic dielectric film with a thickness of only 30 nm, which may find potential applications in nanophotonics, magnonics, and spintronics.Jing ChenGuohua WuPing GuYumei TangChun YangZhendong YanChaojun TangZhengqi LiuFan GaoPinggen CaiMDPI AGarticlemetasurfacemagnetic resonancestrong couplingtransverse magneto-optical Kerr effectChemistryQD1-999ENNanomaterials, Vol 11, Iss 2825, p 2825 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	metasurface magnetic resonance strong coupling transverse magneto-optical Kerr effect Chemistry QD1-999
spellingShingle	metasurface magnetic resonance strong coupling transverse magneto-optical Kerr effect Chemistry QD1-999 Jing Chen Guohua Wu Ping Gu Yumei Tang Chun Yang Zhendong Yan Chaojun Tang Zhengqi Liu Fan Gao Pinggen Cai Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films
description	We study how to enhance the transverse magneto-optical Kerr effect (TMOKE) of ultra-thin magnetic dielectric films through the excitation of strong magnetic resonances on metasurface with a metal nanowire array stacked above a metal substrate with an ultra-thin magnetic dielectric film spacer. The plasmonic hybridizations between the Au nanowires and substrate result in magnetic resonances. The periodic arrangement of the Au nanowires can excite propagating surface plasmon polaritons (SPPs) on the metal surface. When the SPPs and the magnetic resonances hybridize, they can strongly couple to form two strong magnetic resonances, which are explained by a coupled oscillator model. Importantly, benefitting from the strong magnetic resonances, we can achieve a large TMOKE signal up to 26% in the ultra-thin magnetic dielectric film with a thickness of only 30 nm, which may find potential applications in nanophotonics, magnonics, and spintronics.
format	article
author	Jing Chen Guohua Wu Ping Gu Yumei Tang Chun Yang Zhendong Yan Chaojun Tang Zhengqi Liu Fan Gao Pinggen Cai
author_facet	Jing Chen Guohua Wu Ping Gu Yumei Tang Chun Yang Zhendong Yan Chaojun Tang Zhengqi Liu Fan Gao Pinggen Cai
author_sort	Jing Chen
title	Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films
title_short	Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films
title_full	Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films
title_fullStr	Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films
title_full_unstemmed	Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films
title_sort	theoretical study on metasurfaces for transverse magneto-optical kerr effect enhancement of ultra-thin magnetic dielectric films
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/060d1d0454254b09b7d7a2eb729ee5de
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Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films

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