中国物理B ›› 2025, Vol. 34 ›› Issue (1): 14302-014302.doi: 10.1088/1674-1056/ad8db6

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High-efficiency wide-angle anomalous refraction with acoustic metagrating

Kangyao Sun(孙康瑶), Yuancheng Fan(樊元成)†, Zhehao Ye(叶哲浩), Jiahui Li(李嘉荟), Quanhong Fu(付全红), Yali Zeng(曾雅丽), and Fuli Zhang(张富利)‡   

  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
  • 收稿日期:2024-09-30 修回日期:2024-10-28 接受日期:2024-11-01 发布日期:2024-12-24
  • 通讯作者: Yuancheng Fan, Fuli Zhang E-mail:phyfan@nwpu.edu.cn;fuli.zhang@nwpu.edu.cn
  • 基金资助:
    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), and the Fundamental Research Funds for the Central Universities.

High-efficiency wide-angle anomalous refraction with acoustic metagrating

Kangyao Sun(孙康瑶), Yuancheng Fan(樊元成)†, Zhehao Ye(叶哲浩), Jiahui Li(李嘉荟), Quanhong Fu(付全红), Yali Zeng(曾雅丽), and Fuli Zhang(张富利)‡   

  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
  • Received:2024-09-30 Revised:2024-10-28 Accepted:2024-11-01 Published:2024-12-24
  • Contact: Yuancheng Fan, Fuli Zhang E-mail:phyfan@nwpu.edu.cn;fuli.zhang@nwpu.edu.cn
  • About author:2025-014302-241424.pdf
  • Supported by:
    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), and the Fundamental Research Funds for the Central Universities.

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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$^\circ$ to 78$^\circ$, and the efficiency of $-1$st order diffraction is higher than 90% by finely designing the metagrating structure. The anomalous refraction behaviors are verified experimentally at incidence angle of 28$^\circ$, 45$^\circ$, and 78$^\circ$, 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

Abstract: 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$^\circ$ to 78$^\circ$, and the efficiency of $-1$st order diffraction is higher than 90% by finely designing the metagrating structure. The anomalous refraction behaviors are verified experimentally at incidence angle of 28$^\circ$, 45$^\circ$, and 78$^\circ$, respectively. The demonstrated metagrating is anticipated to possess efficient wide-angle composite wavefront engineering applications in such fields as communications.

Key words: acoustic metagrating, beam steering, wide-angle anomalous refraction

中图分类号:  (Reflection, refraction, diffraction of acoustic waves)

  • 43.20.El
43.40.+s (Structural acoustics and vibration) 81.05.Xj (Metamaterials for chiral, bianisotropic and other complex media)