Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer

Abstract Subwavelength resonant elements are essential building blocks of metamaterials and metasurfaces, which have revolutionized photonics. Despite similarities between different wave phenomena, other types of interactions can make subwavelength coupling significantly distinct; its investigation...

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Autores principales:	Krzysztof Sobucki, Wojciech Śmigaj, Justyna Rychły, Maciej Krawczyk, Paweł Gruszecki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/360f21bd6ec44896a24707a9292f18ad
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spelling	oai:doaj.org-article:360f21bd6ec44896a24707a9292f18ad2021-12-02T13:19:29ZResonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer10.1038/s41598-021-83307-92045-2322https://doaj.org/article/360f21bd6ec44896a24707a9292f18ad2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83307-9https://doaj.org/toc/2045-2322Abstract Subwavelength resonant elements are essential building blocks of metamaterials and metasurfaces, which have revolutionized photonics. Despite similarities between different wave phenomena, other types of interactions can make subwavelength coupling significantly distinct; its investigation in their context is therefore of interest both from the physics and applications perspective. In this work, we demonstrate a fully magnonic Gires–Tournois interferometer based on a subwavelength resonator made of a narrow ferromagnetic stripe lying above the edge of a ferromagnetic film. The bilayer formed by the stripe and the film underneath supports two propagative spin-wave modes, one strongly coupled with spin waves propagating in the rest of the film and another almost completely reflected at the ends of the bilayer. When the Fabry–Perot resonance conditions for this mode are satisfied, the weak coupling between both modes is sufficient to achieve high sensitivity of the phase of waves reflected from the resonator to the stripe width and, more interestingly, also to the stripe-film separation. Such spin-wave phase manipulation capabilities are a prerequisite for the design of spin-wave metasurfaces and may stimulate development of magnonic logic devices and sensors detecting magnetic nanoparticles.Krzysztof SobuckiWojciech ŚmigajJustyna RychłyMaciej KrawczykPaweł GruszeckiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Krzysztof Sobucki Wojciech Śmigaj Justyna Rychły Maciej Krawczyk Paweł Gruszecki Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
description	Abstract Subwavelength resonant elements are essential building blocks of metamaterials and metasurfaces, which have revolutionized photonics. Despite similarities between different wave phenomena, other types of interactions can make subwavelength coupling significantly distinct; its investigation in their context is therefore of interest both from the physics and applications perspective. In this work, we demonstrate a fully magnonic Gires–Tournois interferometer based on a subwavelength resonator made of a narrow ferromagnetic stripe lying above the edge of a ferromagnetic film. The bilayer formed by the stripe and the film underneath supports two propagative spin-wave modes, one strongly coupled with spin waves propagating in the rest of the film and another almost completely reflected at the ends of the bilayer. When the Fabry–Perot resonance conditions for this mode are satisfied, the weak coupling between both modes is sufficient to achieve high sensitivity of the phase of waves reflected from the resonator to the stripe width and, more interestingly, also to the stripe-film separation. Such spin-wave phase manipulation capabilities are a prerequisite for the design of spin-wave metasurfaces and may stimulate development of magnonic logic devices and sensors detecting magnetic nanoparticles.
format	article
author	Krzysztof Sobucki Wojciech Śmigaj Justyna Rychły Maciej Krawczyk Paweł Gruszecki
author_facet	Krzysztof Sobucki Wojciech Śmigaj Justyna Rychły Maciej Krawczyk Paweł Gruszecki
author_sort	Krzysztof Sobucki
title	Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
title_short	Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
title_full	Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
title_fullStr	Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
title_full_unstemmed	Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
title_sort	resonant subwavelength control of the phase of spin waves reflected from a gires–tournois interferometer
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/360f21bd6ec44896a24707a9292f18ad
work_keys_str_mv	AT krzysztofsobucki resonantsubwavelengthcontrolofthephaseofspinwavesreflectedfromagirestournoisinterferometer AT wojciechsmigaj resonantsubwavelengthcontrolofthephaseofspinwavesreflectedfromagirestournoisinterferometer AT justynarychły resonantsubwavelengthcontrolofthephaseofspinwavesreflectedfromagirestournoisinterferometer AT maciejkrawczyk resonantsubwavelengthcontrolofthephaseofspinwavesreflectedfromagirestournoisinterferometer AT pawełgruszecki resonantsubwavelengthcontrolofthephaseofspinwavesreflectedfromagirestournoisinterferometer
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Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer

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