Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/106311
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Mechanical Engineering | - |
dc.creator | Dong, HW | en_US |
dc.creator | Zhao, SD | en_US |
dc.creator | Zhu, R | en_US |
dc.creator | Wang, YS | en_US |
dc.creator | Cheng, L | en_US |
dc.creator | Zhang, C | en_US |
dc.date.accessioned | 2024-05-09T00:52:38Z | - |
dc.date.available | 2024-05-09T00:52:38Z | - |
dc.identifier.issn | 0022-460X | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/106311 | - |
dc.language.iso | en | en_US |
dc.publisher | Elsevier Ltd | en_US |
dc.rights | © 2020 Elsevier Ltd. All rights reserved. | en_US |
dc.rights | © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. | en_US |
dc.rights | The following publication Dong, H. W., Zhao, S. D., Zhu, R., Wang, Y. S., Cheng, L., & Zhang, C. (2021). Customizing acoustic dirac cones and topological insulators in square lattices by topology optimization. Journal of Sound and Vibration, 493, 115687 is available at https://doi.org/10.1016/j.jsv.2020.115687. | en_US |
dc.subject | Degeneracy | en_US |
dc.subject | Dirac cone | en_US |
dc.subject | Quantum spin-hall effect | en_US |
dc.subject | Sonic crystals | en_US |
dc.subject | Topological insulator | en_US |
dc.subject | Topology optimization | en_US |
dc.title | Customizing acoustic dirac cones and topological insulators in square lattices by topology optimization | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.volume | 493 | en_US |
dc.identifier.doi | 10.1016/j.jsv.2020.115687 | en_US |
dcterms.abstract | Dirac point, the cornerstone of topological insulators, has been attracting ever-increasing attention due to its extraordinary properties. In this paper, a bottom-up topology optimization approach is established to systematically design the acoustic Dirac cones with customized double, triple and quadruple degeneracies at different wavelength scales. Using the proposed methodology, novel square-symmetric, chiral and orthogonal-symmetric sonic crystals (SCs) are constructed in a square lattice with tailored Dirac cones. The proposed design approach offers a unified framework to tailor SCs with exotic functionalities which are being widely researched in acoustic metamaterial community. As illustrative examples, zero-index acoustic cloaking and Talbot effect near the Dirac points of the optimized SCs are demonstrated numerically. Moreover, a novel acoustic pseudo-spin topological insulator is obtained, which entails a robust zigzag wave propagation and broadband, unidirectional, and topologically protected transport with a record-breaking relative bandwidth of 30.51%. The proposed design methodology shows promise and opens new horizons for customizing topological acoustics and conceiving high-efficiency wave devices. | - |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Journal of sound and vibration, 17 Feb. 2021, v. 493, 115687 | en_US |
dcterms.isPartOf | Journal of sound and vibration | en_US |
dcterms.issued | 2021-02-17 | - |
dc.identifier.scopus | 2-s2.0-85096200572 | - |
dc.identifier.eissn | 1095-8568 | en_US |
dc.identifier.artn | 115687 | en_US |
dc.description.validate | 202405 bcch | - |
dc.description.oa | Accepted Manuscript | en_US |
dc.identifier.FolderNumber | ME-0108 | - |
dc.description.fundingSource | Others | en_US |
dc.description.fundingText | Hong Kong Scholars Program; National Natural Science Foundation of China; Postdoctoral Science Foundation; Fundamental Research Funds for the Central Universities; Sino-German Joint Research Program; German Research Foundation | en_US |
dc.description.pubStatus | Published | en_US |
dc.identifier.OPUS | 39192035 | - |
dc.description.oaCategory | Green (AAM) | en_US |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
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Cheng_Customizing_Acoustic_Dirac.pdf | Pre-Published version | 2.11 MB | Adobe PDF | View/Open |
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