Acoustic frequency filter based on anisotropic topological phononic crystals

Handle URI:
http://hdl.handle.net/10754/626152
Title:
Acoustic frequency filter based on anisotropic topological phononic crystals
Authors:
Chen, Zeguo ( 0000-0002-2910-8264 ) ; Zhao, Jiajun; Mei, Jun ( 0000-0002-6308-4956 ) ; Wu, Ying ( 0000-0002-7919-1107 )
Abstract:
We present a design of acoustic frequency filter based on a two-dimensional anisotropic phononic crystal. The anisotropic band structure exhibits either a directional or a combined (global + directional) bandgap at certain frequency regions, depending on the geometry. When the time-reversal symmetry is broken, it may introduce a topologically nontrivial bandgap. The induced nontrivial bandgap and the original directional bandgap result in various interesting wave propagation behaviors, such as frequency filter. We develop a tight-binding model to characterize the effective Hamiltonian of the system, from which the contribution of anisotropy is explicitly shown. Different from the isotropic cases, the Zeeman-type splitting is not linear and the anisotropic bandgap makes it possible to achieve anisotropic propagation characteristics along different directions and at different frequencies.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Chen Z-G, Zhao J, Mei J, Wu Y (2017) Acoustic frequency filter based on anisotropic topological phononic crystals. Scientific Reports 7. Available: http://dx.doi.org/10.1038/s41598-017-15409-2.
Publisher:
Springer Nature
Journal:
Scientific Reports
Issue Date:
2-Nov-2017
DOI:
10.1038/s41598-017-15409-2
Type:
Article
ISSN:
2045-2322
Sponsors:
The work described here was supported by King Abdullah University of Science and Technology, and National Natural Science Foundation of China (Grant Nos 11274120 and 11574087).
Additional Links:
https://www.nature.com/articles/s41598-017-15409-2
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChen, Zeguoen
dc.contributor.authorZhao, Jiajunen
dc.contributor.authorMei, Junen
dc.contributor.authorWu, Yingen
dc.date.accessioned2017-11-14T12:46:05Z-
dc.date.available2017-11-14T12:46:05Z-
dc.date.issued2017-11-02en
dc.identifier.citationChen Z-G, Zhao J, Mei J, Wu Y (2017) Acoustic frequency filter based on anisotropic topological phononic crystals. Scientific Reports 7. Available: http://dx.doi.org/10.1038/s41598-017-15409-2.en
dc.identifier.issn2045-2322en
dc.identifier.doi10.1038/s41598-017-15409-2en
dc.identifier.urihttp://hdl.handle.net/10754/626152-
dc.description.abstractWe present a design of acoustic frequency filter based on a two-dimensional anisotropic phononic crystal. The anisotropic band structure exhibits either a directional or a combined (global + directional) bandgap at certain frequency regions, depending on the geometry. When the time-reversal symmetry is broken, it may introduce a topologically nontrivial bandgap. The induced nontrivial bandgap and the original directional bandgap result in various interesting wave propagation behaviors, such as frequency filter. We develop a tight-binding model to characterize the effective Hamiltonian of the system, from which the contribution of anisotropy is explicitly shown. Different from the isotropic cases, the Zeeman-type splitting is not linear and the anisotropic bandgap makes it possible to achieve anisotropic propagation characteristics along different directions and at different frequencies.en
dc.description.sponsorshipThe work described here was supported by King Abdullah University of Science and Technology, and National Natural Science Foundation of China (Grant Nos 11274120 and 11574087).en
dc.publisherSpringer Natureen
dc.relation.urlhttps://www.nature.com/articles/s41598-017-15409-2en
dc.rightsThis 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/.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleAcoustic frequency filter based on anisotropic topological phononic crystalsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalScientific Reportsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionGOWell International LLC, Houston, Texas, 77041, USA.en
dc.contributor.institutionDepartment of Physics, South China University of Technology, Guangzhou, 510640, China.en
kaust.authorChen, Zeguoen
kaust.authorWu, Yingen
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