Broadband subwavelength tunable valley edge states induced by fluid filling acoustic metastructure | |
Yang T(杨洮)1,2; Chen M(陈猛)1,2; Liu Y(刘宇)1,2; Xiao BY(肖伯雅)1,2; Wang,Xilin3; Pei DL(裴东亮)1,2; Jiang H(姜恒)1,2; Wang YR(王育人)1,2 | |
发表期刊 | Journal of Physics Communications |
2022-06-01 | |
卷号 | 6期号:6页码:065003 |
摘要 | Abstract Topological acoustic insulators demonstrate unusual characteristics in manipulating sound wave, which attract much attention from researchers. However, most of the recent researches are based on passive system, hampering their dispersion tunability. In this paper, a broadband subwavelength tunable fluid filling acoustic topological metastructure is studied. It is composed of perforated cells with tunable water height in the hole, which enables the dispersion of the edge state to be tuned. The inversion symmetry is broken by expanding and shrinking the adjacent holes in the unit cell. Thus, the valley Hall states with opposite Chern number form at the K point in the Brillouin zone. The edge states emerge at the boundary of the different valley Hall phases. The robustness of the edge states is verified by the straight and Z-shaped waveguide. Furthermore, the dispersion of the edge state can be altered continuously by raising and reducing the water height, giving rise to broadband variable topological states, which greatly expands the bandwidth from 40 Hz to 1033 Hz. This work offers a new method to control the topological states and shows great potential for practical application. |
关键词 | topological acoustic edge state subwavelength active tunability |
DOI | 10.1088/2399-6528/ac70a8 |
语种 | 英语 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/91975 |
专题 | 微重力重点实验室 |
通讯作者 | Chen M(陈猛); Jiang H(姜恒) |
作者单位 | 1.Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China 2.University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China 3.Beijing Information Science and Technology University, 100192, People’s Republic of China |
推荐引用方式 GB/T 7714 | Yang T,Chen M,Liu Y,et al. Broadband subwavelength tunable valley edge states induced by fluid filling acoustic metastructure[J]. Journal of Physics Communications,2022,6,6,:065003. |
APA | Yang T.,Chen M.,Liu Y.,Xiao BY.,Wang,Xilin.,...&Wang YR.(2022).Broadband subwavelength tunable valley edge states induced by fluid filling acoustic metastructure.Journal of Physics Communications,6(6),065003. |
MLA | Yang T,et al."Broadband subwavelength tunable valley edge states induced by fluid filling acoustic metastructure".Journal of Physics Communications 6.6(2022):065003. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Yang_2022_J._Phys._C(1328KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论