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Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces

Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles. In acoustics, vortex beams are generally observed on the surface of a metam...

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Autores principales: Wang, Yin, Qian, Jiao, Xia, Jian-Ping, Ge, Yong, Yuan, Shou-Qi, Sun, Hong-Xiang, Liu, Xiao-Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623545/
https://www.ncbi.nlm.nih.gov/pubmed/34832800
http://dx.doi.org/10.3390/mi12111388
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author Wang, Yin
Qian, Jiao
Xia, Jian-Ping
Ge, Yong
Yuan, Shou-Qi
Sun, Hong-Xiang
Liu, Xiao-Jun
author_facet Wang, Yin
Qian, Jiao
Xia, Jian-Ping
Ge, Yong
Yuan, Shou-Qi
Sun, Hong-Xiang
Liu, Xiao-Jun
author_sort Wang, Yin
collection PubMed
description Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles. In acoustics, vortex beams are generally observed on the surface of a metamaterial structure or in a waveguide with a hard boundary owing to the characteristic of easy diffusion in free space. The realization of an acoustic vortex beam with a long-distance propagation in free space still remains a challenge. To overcome this, we report a type of acoustic Bessel vortex (ABV) beam created by a quasi-three-dimensional reflected metasurface in free space based on phase modulation. By using the Bessel and vortex phase profiles, we can realize an ABV beam with the high performances of both Bessel and vortex beams, and its effective propagation distance is larger than 9.2λ in free space. Beyond that, we discuss the bandwidth and topological charge of the ABV beam in detail, and the fractional bandwidth can reach about 0.28. The proposed ABV beam has the advantages of a high-performance vortex, long-distance propagation, and broad bandwidth, which provide a new pathway for designing multifunctional vortex devices with promising applications.
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spelling pubmed-86235452021-11-27 Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces Wang, Yin Qian, Jiao Xia, Jian-Ping Ge, Yong Yuan, Shou-Qi Sun, Hong-Xiang Liu, Xiao-Jun Micromachines (Basel) Article Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles. In acoustics, vortex beams are generally observed on the surface of a metamaterial structure or in a waveguide with a hard boundary owing to the characteristic of easy diffusion in free space. The realization of an acoustic vortex beam with a long-distance propagation in free space still remains a challenge. To overcome this, we report a type of acoustic Bessel vortex (ABV) beam created by a quasi-three-dimensional reflected metasurface in free space based on phase modulation. By using the Bessel and vortex phase profiles, we can realize an ABV beam with the high performances of both Bessel and vortex beams, and its effective propagation distance is larger than 9.2λ in free space. Beyond that, we discuss the bandwidth and topological charge of the ABV beam in detail, and the fractional bandwidth can reach about 0.28. The proposed ABV beam has the advantages of a high-performance vortex, long-distance propagation, and broad bandwidth, which provide a new pathway for designing multifunctional vortex devices with promising applications. MDPI 2021-11-12 /pmc/articles/PMC8623545/ /pubmed/34832800 http://dx.doi.org/10.3390/mi12111388 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Yin
Qian, Jiao
Xia, Jian-Ping
Ge, Yong
Yuan, Shou-Qi
Sun, Hong-Xiang
Liu, Xiao-Jun
Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
title Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
title_full Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
title_fullStr Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
title_full_unstemmed Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
title_short Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
title_sort acoustic bessel vortex beam by quasi-three-dimensional reflected metasurfaces
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623545/
https://www.ncbi.nlm.nih.gov/pubmed/34832800
http://dx.doi.org/10.3390/mi12111388
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