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| DOI | 10.1016/j.scib.2021.05.013 |
| Multi-dimensional wave steering with higher-order topological phononic crystal | |
| Xu C.; Chen Z.-G.; Zhang G.; Ma G.; Wu Y. | |
| 发表日期 | 2021 |
| ISSN | 20959273 |
| 起始页码 | 1740 |
| 结束页码 | 1745 |
| 卷号 | 66期号:17 |
| 英文摘要 | The recent discovery and realizations of higher-order topological insulators enrich the fundamental studies on topological phases. Here, we report three-dimensional (3D) wave-steering capabilities enabled by topological boundary states at three different orders in a 3D phononic crystal with nontrivial bulk topology originated from the synergy of mirror symmetry of the unit cell and a non-symmorphic glide symmetry of the lattice. The multitude of topological states brings diverse possibilities of wave manipulations. Through judicious engineering of the boundary modes, we experimentally demonstrate two functionalities at different dimensions: 2D negative refraction of sound wave enabled by a first-order topological surface state with negative dispersion, and a 3D acoustic interferometer leveraging on second-order topological hinge states. Our work showcases that topological modes at different orders promise diverse wave steering applications across different dimensions. © 2021 Science China Press |
| 关键词 | 3D acoustic interferometerHigher-order topological insulatorNegative refractionTopological states |
| 英文关键词 | Acoustics; Electric insulators; Phonons; Topology; 3d acoustic interferometer; Fundamental studies; High-order; High-order topological insulator; Higher-order; Multi dimensional; Negative refractions; Phononic Crystal; Topological insulators; Topological state; Interferometers |
| 语种 | 英语 |
| 来源期刊 | Science Bulletin
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/207628 |
| 作者单位 | Division of Computer, Electrical and Mathematical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia; Department of Physics, Hong Kong Baptist University, Hong Kong |
| 推荐引用方式 GB/T 7714 | Xu C.,Chen Z.-G.,Zhang G.,et al. Multi-dimensional wave steering with higher-order topological phononic crystal[J],2021,66(17). |
| APA | Xu C.,Chen Z.-G.,Zhang G.,Ma G.,&Wu Y..(2021).Multi-dimensional wave steering with higher-order topological phononic crystal.Science Bulletin,66(17). |
| MLA | Xu C.,et al."Multi-dimensional wave steering with higher-order topological phononic crystal".Science Bulletin 66.17(2021). |
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