Acoustic bilayer gradient metasurfaces for perfect and asymmetric beam splitting

IF 3.5 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Chinese Physics Letters Pub Date : 2023-12-14 DOI:10.1088/0256-307x/41/1/014301
Jiaqi Quan, Baoyin Sun, Yangyang Fu, Lei Gao, Yadong Xu
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Abstract

We experimentally and theoretically present a paradigm for the accurate bilayer design of gradient metasurfaces for wave beam manipulation, producing extremely asymmetric splitting effect by simply tailoring the interlayer size. This concept arises from the anomalous diffraction in phase gradient metasurfaces and the precise combination of the phase gradient in bilayer metasurfaces. Ensured by different diffraction routes in momentum space for incident beam from opposite direction, extremely asymmetric acoustic beam splitting can be generated in a robust way, as demonstrated through a designed bilayer system in experiments. Our work provides a novel approach and feasible platform to design tunable devices for the control of wave propagation.
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用于完美和非对称分束的声学双层梯度元表面
我们从实验和理论上提出了一种用于波束操纵的梯度元表面双层精确设计范例,只需调整层间尺寸即可产生极不对称的分裂效果。这一概念源于相位梯度元表面中的反常衍射以及双层元表面中相位梯度的精确组合。由于来自相反方向的入射光束在动量空间中的衍射路径不同,因此可以稳健地产生极不对称的声波分束,这一点已在实验中通过设计双层系统得到证实。我们的工作为设计用于控制波传播的可调装置提供了一种新方法和可行平台。
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来源期刊
Chinese Physics Letters
Chinese Physics Letters 物理-物理:综合
CiteScore
5.90
自引率
8.60%
发文量
13238
审稿时长
4 months
期刊介绍: Chinese Physics Letters provides rapid publication of short reports and important research in all fields of physics and is published by the Chinese Physical Society and hosted online by IOP Publishing.
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