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Realization of acoustic spin transport in metasurface waveguides

Spin angular momentum enables fundamental insights for topological matters, and practical implications for information devices. Exploiting the spin of carriers and waves is critical to achieving more controllable degrees of freedom and robust transport processes. Yet, due to the curl-free nature of...

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Autores principales: Long, Yang, Zhang, Danmei, Yang, Chenwen, Ge, Jianmin, Chen, Hong, Ren, Jie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7501247/
https://www.ncbi.nlm.nih.gov/pubmed/32948761
http://dx.doi.org/10.1038/s41467-020-18599-y
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author Long, Yang
Zhang, Danmei
Yang, Chenwen
Ge, Jianmin
Chen, Hong
Ren, Jie
author_facet Long, Yang
Zhang, Danmei
Yang, Chenwen
Ge, Jianmin
Chen, Hong
Ren, Jie
author_sort Long, Yang
collection PubMed
description Spin angular momentum enables fundamental insights for topological matters, and practical implications for information devices. Exploiting the spin of carriers and waves is critical to achieving more controllable degrees of freedom and robust transport processes. Yet, due to the curl-free nature of longitudinal waves distinct from transverse electromagnetic waves, spin angular momenta of acoustic waves in solids and fluids have never been unveiled only until recently. Here, we demonstrate a metasurface waveguide for sound carrying non-zero acoustic spin with tight spin-momentum coupling, which can assist the suppression of backscattering when scatters fail to flip the acoustic spin. This is achieved by imposing a soft boundary of the π reflection phase, realized by comb-like metasurfaces. With the special-boundary-defined spin texture, the acoustic spin transports are experimentally manifested, such as the suppression of acoustic corner-scattering, the spin-selected acoustic router with spin-Hall-like effect, and the phase modulator with rotated acoustic spin.
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spelling pubmed-75012472020-10-01 Realization of acoustic spin transport in metasurface waveguides Long, Yang Zhang, Danmei Yang, Chenwen Ge, Jianmin Chen, Hong Ren, Jie Nat Commun Article Spin angular momentum enables fundamental insights for topological matters, and practical implications for information devices. Exploiting the spin of carriers and waves is critical to achieving more controllable degrees of freedom and robust transport processes. Yet, due to the curl-free nature of longitudinal waves distinct from transverse electromagnetic waves, spin angular momenta of acoustic waves in solids and fluids have never been unveiled only until recently. Here, we demonstrate a metasurface waveguide for sound carrying non-zero acoustic spin with tight spin-momentum coupling, which can assist the suppression of backscattering when scatters fail to flip the acoustic spin. This is achieved by imposing a soft boundary of the π reflection phase, realized by comb-like metasurfaces. With the special-boundary-defined spin texture, the acoustic spin transports are experimentally manifested, such as the suppression of acoustic corner-scattering, the spin-selected acoustic router with spin-Hall-like effect, and the phase modulator with rotated acoustic spin. Nature Publishing Group UK 2020-09-18 /pmc/articles/PMC7501247/ /pubmed/32948761 http://dx.doi.org/10.1038/s41467-020-18599-y Text en © The Author(s) 2020 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
Long, Yang
Zhang, Danmei
Yang, Chenwen
Ge, Jianmin
Chen, Hong
Ren, Jie
Realization of acoustic spin transport in metasurface waveguides
title Realization of acoustic spin transport in metasurface waveguides
title_full Realization of acoustic spin transport in metasurface waveguides
title_fullStr Realization of acoustic spin transport in metasurface waveguides
title_full_unstemmed Realization of acoustic spin transport in metasurface waveguides
title_short Realization of acoustic spin transport in metasurface waveguides
title_sort realization of acoustic spin transport in metasurface waveguides
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7501247/
https://www.ncbi.nlm.nih.gov/pubmed/32948761
http://dx.doi.org/10.1038/s41467-020-18599-y
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