Observation of topological charge transformations in acoustic vortex using passive periodic systems
作者机构：School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University
出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学 力学 天文学(英文版))
年 卷 期：2025年第Mechanics & Astronomy) .卷第1期
页 面：140-147页
核心收录：
学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China (Grant Nos. 12374439, 12174197, 12074191, 12027808, and 12404531) the Higher Education Institutions NSF of Jiangsu Province(Grant No. 23KJB140011)
主 题：acoustic vortex topological charge transformation artificial structure
摘 要：Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.
同方期刊数据库