Vortex states in an acoustic Weyl crystal with a topological lattice defect

Crystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robu...

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Main Authors: Wang, Qiang, Ge, Yong, Sun, Hong-Xiang, Xue, Haoran, Jia, Ding, Guan, Yi-Jun, Yuan, Shou-Qi, Zhang, Baile, Chong, Yidong
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/154618
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1546182023-02-28T20:00:22Z Vortex states in an acoustic Weyl crystal with a topological lattice defect Wang, Qiang Ge, Yong Sun, Hong-Xiang Xue, Haoran Jia, Ding Guan, Yi-Jun Yuan, Shou-Qi Zhang, Baile Chong, Yidong School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) Science::Physics::Acoustics Topological Defects Topological Acoustics Crystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topological features of the bulk bands, and carry nonzero orbital angular momentum locked to the direction of propagation. They span a range of axial wavenumbers defined by the projections of two bulk Weyl points to a one-dimensional subspace, in a manner analogous to the formation of Fermi arc surface states. We use acoustic experiments to probe their dispersion relation, orbital angular momentum locked waveguiding, and ability to emit acoustic vortices into free space. These results point to new possibilities for creating and exploiting topological modes in three-dimensional structures through the interplay between band topology in momentum space and topological lattice defects in real space. Ministry of Education (MOE) Published version Q.W., H.X., B.Z. and Y.C. acknowledge support from Singapore MOE Academic Research Fund Tier 3 Grant MOE2016-T3-1-006, Tier 1 Grant RG187/18, and Tier 2 Grant MOE2019-T2-2-085. Y.G., H.-X. S., D.J., Y.-J.G. and S.-Q.Y. acknowledge support from the National Natural Science Foundation of China under Grants No. 11774137 and 51779107, National Key R&D Program Project (No. 2020YFC1512403 and 2020YFC1512400) and the State Key Laboratory of Acoustics, Chinese Academy of Science under Grant No. SKLA202016. 2022-01-03T01:47:21Z 2022-01-03T01:47:21Z 2021 Journal Article Wang, Q., Ge, Y., Sun, H., Xue, H., Jia, D., Guan, Y., Yuan, S., Zhang, B. & Chong, Y. (2021). Vortex states in an acoustic Weyl crystal with a topological lattice defect. Nature Communications, 12(1), 3654-. https://dx.doi.org/10.1038/s41467-021-23963-7 2041-1723 https://hdl.handle.net/10356/154618 10.1038/s41467-021-23963-7 34135328 2-s2.0-85108170203 1 12 3654 en MOE2016-T3-1-006 RG187/18 MOE2019-T2-2-085 Nature Communications 10.21979/N9/THY532 © 2021 The Author(s). 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/. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics::Acoustics
Topological Defects
Topological Acoustics
spellingShingle Science::Physics::Acoustics
Topological Defects
Topological Acoustics
Wang, Qiang
Ge, Yong
Sun, Hong-Xiang
Xue, Haoran
Jia, Ding
Guan, Yi-Jun
Yuan, Shou-Qi
Zhang, Baile
Chong, Yidong
Vortex states in an acoustic Weyl crystal with a topological lattice defect
description Crystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topological features of the bulk bands, and carry nonzero orbital angular momentum locked to the direction of propagation. They span a range of axial wavenumbers defined by the projections of two bulk Weyl points to a one-dimensional subspace, in a manner analogous to the formation of Fermi arc surface states. We use acoustic experiments to probe their dispersion relation, orbital angular momentum locked waveguiding, and ability to emit acoustic vortices into free space. These results point to new possibilities for creating and exploiting topological modes in three-dimensional structures through the interplay between band topology in momentum space and topological lattice defects in real space.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Wang, Qiang
Ge, Yong
Sun, Hong-Xiang
Xue, Haoran
Jia, Ding
Guan, Yi-Jun
Yuan, Shou-Qi
Zhang, Baile
Chong, Yidong
format Article
author Wang, Qiang
Ge, Yong
Sun, Hong-Xiang
Xue, Haoran
Jia, Ding
Guan, Yi-Jun
Yuan, Shou-Qi
Zhang, Baile
Chong, Yidong
author_sort Wang, Qiang
title Vortex states in an acoustic Weyl crystal with a topological lattice defect
title_short Vortex states in an acoustic Weyl crystal with a topological lattice defect
title_full Vortex states in an acoustic Weyl crystal with a topological lattice defect
title_fullStr Vortex states in an acoustic Weyl crystal with a topological lattice defect
title_full_unstemmed Vortex states in an acoustic Weyl crystal with a topological lattice defect
title_sort vortex states in an acoustic weyl crystal with a topological lattice defect
publishDate 2022
url https://hdl.handle.net/10356/154618
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