Topological Surface States in a Gyroid Acoustic Crystal
Abstract The acoustic properties of an acoustic crystal consisting of acoustic channels designed according to the gyroid minimal surface embedded in a 3D rigid material are investigated. The resulting gyroid acoustic crystal is characterized by a spin‐1 Weyl and a charge‐2 Dirac degenerate points th...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-02-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202205723 |
| _version_ | 1797895054113636352 |
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| author | Yuning Guo Matheus I. N. Rosa Massimo Ruzzene |
| author_facet | Yuning Guo Matheus I. N. Rosa Massimo Ruzzene |
| author_sort | Yuning Guo |
| collection | DOAJ |
| description | Abstract The acoustic properties of an acoustic crystal consisting of acoustic channels designed according to the gyroid minimal surface embedded in a 3D rigid material are investigated. The resulting gyroid acoustic crystal is characterized by a spin‐1 Weyl and a charge‐2 Dirac degenerate points that are enforced by its nonsymmorphic symmetry. The gyroid geometry and its symmetries produce multi‐fold topological degeneracies that occur naturally without the need for ad hoc geometry designs. The non‐trivial topology of the acoustic dispersion produces chiral surface states with open arcs, which manifest themselves as waves whose propagation is highly directional and remains confined to the surfaces of a 3D material. Experiments on an additively manufactured sample validate the predictions of surface arc states and produce negative refraction of waves at the interface between adjoining surfaces. The topological surface states in a gyroid acoustic crystal shed light on nontrivial bulk and edge physics in symmetry‐based compact continuum materials, whose capabilities augment those observed in ad hoc designs. The continuous shape design of the considered acoustic channels and the ensuing anomalous acoustic performance suggest this class of phononic materials with semimetal‐like topology as effective building blocks for acoustic liners and load‐carrying structural components with sound proofing functionality. |
| first_indexed | 2024-04-10T07:20:20Z |
| format | Article |
| id | doaj.art-10ca3337734d4720994c0bba9887af61 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-10T07:20:20Z |
| publishDate | 2023-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-10ca3337734d4720994c0bba9887af612023-02-24T12:27:40ZengWileyAdvanced Science2198-38442023-02-01106n/an/a10.1002/advs.202205723Topological Surface States in a Gyroid Acoustic CrystalYuning Guo0Matheus I. N. Rosa1Massimo Ruzzene2P. M. Rady Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USAP. M. Rady Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USAP. M. Rady Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USAAbstract The acoustic properties of an acoustic crystal consisting of acoustic channels designed according to the gyroid minimal surface embedded in a 3D rigid material are investigated. The resulting gyroid acoustic crystal is characterized by a spin‐1 Weyl and a charge‐2 Dirac degenerate points that are enforced by its nonsymmorphic symmetry. The gyroid geometry and its symmetries produce multi‐fold topological degeneracies that occur naturally without the need for ad hoc geometry designs. The non‐trivial topology of the acoustic dispersion produces chiral surface states with open arcs, which manifest themselves as waves whose propagation is highly directional and remains confined to the surfaces of a 3D material. Experiments on an additively manufactured sample validate the predictions of surface arc states and produce negative refraction of waves at the interface between adjoining surfaces. The topological surface states in a gyroid acoustic crystal shed light on nontrivial bulk and edge physics in symmetry‐based compact continuum materials, whose capabilities augment those observed in ad hoc designs. The continuous shape design of the considered acoustic channels and the ensuing anomalous acoustic performance suggest this class of phononic materials with semimetal‐like topology as effective building blocks for acoustic liners and load‐carrying structural components with sound proofing functionality.https://doi.org/10.1002/advs.202205723gyroid surfacenonsymmorphic symmetryphononic semimetal statesurface mode |
| spellingShingle | Yuning Guo Matheus I. N. Rosa Massimo Ruzzene Topological Surface States in a Gyroid Acoustic Crystal Advanced Science gyroid surface nonsymmorphic symmetry phononic semimetal state surface mode |
| title | Topological Surface States in a Gyroid Acoustic Crystal |
| title_full | Topological Surface States in a Gyroid Acoustic Crystal |
| title_fullStr | Topological Surface States in a Gyroid Acoustic Crystal |
| title_full_unstemmed | Topological Surface States in a Gyroid Acoustic Crystal |
| title_short | Topological Surface States in a Gyroid Acoustic Crystal |
| title_sort | topological surface states in a gyroid acoustic crystal |
| topic | gyroid surface nonsymmorphic symmetry phononic semimetal state surface mode |
| url | https://doi.org/10.1002/advs.202205723 |
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