文献类型：期刊文献

英文题名：Simple acoustic metagrating for perfect two- and three-beam splitting

作者：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, Key Lab Pressure Syst & Safety MOE, Shanghai, Peoples R China

年份：2023

卷号：10

外文期刊名：FRONTIERS IN MATERIALS

收录：;EI(收录号：20230913630834);WOS:【SCI-EXPANDED(收录号:WOS:000936095300001)】；

基金：Funding This work was supported by the National Natural Science Foundation of China (Grant Nos. 12104154, U1930202, 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：beam splitting; periodic grooves; amplitude; power flow; acoustic metagrating

摘要：Acoustic metasurfaces have been widely explored and attracted great attention for their extraordinary wavefront manipulation abilities. In this paper, we propose a simple acoustic metagrating with periodic grooves that can split a normally incident beam into two or three reflected beams. The amplitudes and power flows of different reflected beams can be manipulated by changing the groove parameters. The mirror reflected wave is suppressed for equal two-beam splitting case and allowed for three-beam splitting case. Theoretical analysis and numerical simulations are performed to demonstrate the perfect two- and three-beam splitting performances based on local power conservation. Our research work provides a simple method for designing acoustic beam splitters and has extensive applications in acoustic sensing and communication.