High-efficiency wide-angle anomalous refraction with acoustic metagrating  

作　　者：Kangyao Sun Yuancheng Fan Zhehao Ye Jiahui Li Quanhong Fu Yali Zeng Fuli Zhang 孙康瑶;樊元成;叶哲浩;李嘉荟;付全红;曾雅丽;张富利(MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China

出　　处：《Chinese Physics B》2025年第1期368-372,共5页中国物理B(英文版)

基　　金：Project supported by the National Key Research and Development Program of China(Grant Nos.2023YFB3811400 and 2022YFB3806000);the National Natural Science Foundation of China(Grant No.12074314);the Science and Technology New Star Program of Shaanxi Province,China(Grant No.2023KJXX-148);the Fundamental Research Funds for the Central Universities。

摘　　要：The emergent metagrating,with its unique and flexible beam shaping capabilities,offers new paths to efficient modulation of acoustic waves.In this work,an acoustic metagrating is demonstrated for high-efficiency and wide-angle anomalous refraction.It is shown that the normal reflection and transmission can be totally suppressed by properly modulating the amplitude and phase characteristics of the metagrating supercells for high-efficiency anomalous refraction.The anomalous refraction behavior is achieved in the wide range of incident angles from 28°to 78°,and the efficiency of-1st order diffraction is higher than 90%by finely designing the metagrating structure.The anomalous refraction behaviors are verified experimentally at incidence angle of 28°,45°,and 78°,respectively.The demonstrated metagrating is anticipated to possess efficient wide-angle composite wavefront engineering applications in such fields as communications.

关 键 词：acoustic metagrating beam steering wide-angle anomalous refraction 

分 类 号：O435.1[机械工程—光学工程] O422.3[理学—光学]