Efficient conversion of acoustic vortex using extremely anisotropic metasurface

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外文摘要：Vortex wave and plane wave,as two most fundamental forms of wave propagation,are widely applied in various research fields.However,there is currently a lack of basic mechanism to enable arbitrary conversion between them.In this paper,we propose a new paradigm of extremely anisotropic acoustic metasurface(AM)to achieve the efficient conversion from 2D vortex waves with arbitrary orbital angular momentum(OAM)to plane waves.The underlying physics of this conversion process is ensured by the symmetry shift of AM medium parameters and the directional compensation of phase.Moreover,this novel phenomenon is further veri-fied by analytical calculations,numerical demonstrations,and acoustic experiments,and the deflection angle and direction of the converted plane waves are qualitatively and quantitatively confirmed by a simple formula.Our work provides new possibilities for arbitrary manipulation of acoustic vortex,and holds potential applications in acoustic communication and OAM-based devices.

外文关键词：

efficient wave conversionvortex waveplane waveorbital angular momentumacoustic metasurface

作者：

Zhanlei Hao、Haojie Chen、Yuhang Yin、Cheng-Wei Qiu、Shan Zhu、Huanyang Chen

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作者单位：

Institute of Electromagnetics and Acoustics and Department of Physics,College of Physical Science and Technology,Xiamen University,Xiamen 361005,China

Department of Electrical and Computer Engineering,National University of Singapore,4 Engineering Drive 3,117583,Singapore

Department of Mechanical and Electrical Engineering,Xiamen University,Xiamen 361005,China

Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361005,China

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基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesChina Scholarship Council

项目编号：

2020YFA071010092050102123744102072022003320720230102202106310002

出版年：

2024

DOI：

10.1007/s11467-023-1371-6

物理学前沿

高等教育出版社

物理学前沿

CSTPCD

影响因子：0.816

ISSN：2095-0462

年,卷(期)：2024.19(4)

参考文献量1