文献类型：期刊文献

英文题名：Broadband sound focusing with tunable focus based on reconfigurable acoustic coding metagrating

作者：Bai, Yazhu[1];Song, Ailing[1];Sun, Chaoyu[1];Xiang, Yanxun[1];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China

年份：2023

卷号：122

期号：26

外文期刊名：APPLIED PHYSICS LETTERS

收录：;EI(收录号：20232714359474);WOS:【SCI-EXPANDED(收录号:WOS:001021391400001)】；

基金：This work was supported by the National Key Research and Development Program of China (Grant No. 2022YFF0605604), the National Natural Science Foundation of China (Grant Nos. 12104154 and 12025403), the Shanghai Pujiang Program (Grant No. 21PJ1402400), the Natural Science Foundation of Shanghai (Grant No. 22ZR1416900), and the Young Elite Scientists Sponsorship Program by CAST (Grant No. 2021QNRC001).

语种：英文

外文关键词：Acoustics - Medical imaging - Nondestructive examination - Ultrasonic testing

摘要：In this paper, we propose a reconfigurable acoustic coding metagrating composed of rotatable open-ended round tubes for realizing broadband sound focusing with tunable focus. Integrating reconfigurable idea into coding metagrating, we can implement the conversion of the logical units 0 and 1 simply by mechanically adjusting the rotational angle of the open-ended round tubes. The theoretical analysis, the numerical simulations, and experimental results demonstrate that the proposed coding metagrating can precisely manipulate the focus by alternating the coding arrangements. The proposed metagrating has the advantages of broadband property, precise focusing, and tunable focus. Our work provides promising applications in acoustic imaging, medical ultrasound treatment, and nondestructive testing.