Cargando…

Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals

The valley degree of freedom in crystals offers great potential for manipulating classical waves, however, few studies have investigated valley states with complex wavenumbers, valley states in graded systems, or dispersion tuning for valley states. Here, we present tunable valley phononic crystals...

Descripción completa

Detalles Bibliográficos
Autores principales: Tian, Zhenhua, Shen, Chen, Li, Junfei, Reit, Eric, Bachman, Hunter, Socolar, Joshua E. S., Cummer, Steven A., Jun Huang, Tony
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7005747/
https://www.ncbi.nlm.nih.gov/pubmed/32034148
http://dx.doi.org/10.1038/s41467-020-14553-0
_version_ 1783495003398471680
author Tian, Zhenhua
Shen, Chen
Li, Junfei
Reit, Eric
Bachman, Hunter
Socolar, Joshua E. S.
Cummer, Steven A.
Jun Huang, Tony
author_facet Tian, Zhenhua
Shen, Chen
Li, Junfei
Reit, Eric
Bachman, Hunter
Socolar, Joshua E. S.
Cummer, Steven A.
Jun Huang, Tony
author_sort Tian, Zhenhua
collection PubMed
description The valley degree of freedom in crystals offers great potential for manipulating classical waves, however, few studies have investigated valley states with complex wavenumbers, valley states in graded systems, or dispersion tuning for valley states. Here, we present tunable valley phononic crystals (PCs) composed of hybrid channel-cavity cells with three tunable parameters. Our PCs support valley states and Dirac cones with complex wavenumbers. They can be configured to form chirped valley PCs in which edge modes are slowed to zero group velocity states, where the energy at different frequencies accumulates at different designated locations. They enable multiple functionalities, including tuning of dispersion relations for valley states, robust routing of surface acoustic waves, and spatial modulation of group velocities. This work may spark future investigations of topological states with complex wavenumbers in other classical systems, further study of topological states in graded materials, and the development of acoustic devices.
format Online
Article
Text
id pubmed-7005747
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-70057472020-02-10 Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals Tian, Zhenhua Shen, Chen Li, Junfei Reit, Eric Bachman, Hunter Socolar, Joshua E. S. Cummer, Steven A. Jun Huang, Tony Nat Commun Article The valley degree of freedom in crystals offers great potential for manipulating classical waves, however, few studies have investigated valley states with complex wavenumbers, valley states in graded systems, or dispersion tuning for valley states. Here, we present tunable valley phononic crystals (PCs) composed of hybrid channel-cavity cells with three tunable parameters. Our PCs support valley states and Dirac cones with complex wavenumbers. They can be configured to form chirped valley PCs in which edge modes are slowed to zero group velocity states, where the energy at different frequencies accumulates at different designated locations. They enable multiple functionalities, including tuning of dispersion relations for valley states, robust routing of surface acoustic waves, and spatial modulation of group velocities. This work may spark future investigations of topological states with complex wavenumbers in other classical systems, further study of topological states in graded materials, and the development of acoustic devices. Nature Publishing Group UK 2020-02-07 /pmc/articles/PMC7005747/ /pubmed/32034148 http://dx.doi.org/10.1038/s41467-020-14553-0 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
Tian, Zhenhua
Shen, Chen
Li, Junfei
Reit, Eric
Bachman, Hunter
Socolar, Joshua E. S.
Cummer, Steven A.
Jun Huang, Tony
Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
title Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
title_full Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
title_fullStr Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
title_full_unstemmed Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
title_short Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
title_sort dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7005747/
https://www.ncbi.nlm.nih.gov/pubmed/32034148
http://dx.doi.org/10.1038/s41467-020-14553-0
work_keys_str_mv AT tianzhenhua dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT shenchen dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT lijunfei dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT reiteric dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT bachmanhunter dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT socolarjoshuaes dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT cummerstevena dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals
AT junhuangtony dispersiontuningandroutereconfigurationofacousticwavesinvalleytopologicalphononiccrystals