Acoustic spin-controlled orbital rotations in double spiral acoustic beams

IF 5.4 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Communications Physics Pub Date : 2024-06-29 DOI:10.1038/s42005-024-01702-w

Di-Chao Chen, Xie Liu, Da-Jian Wu, Xing-Feng Zhu, Qi Wei, Ying Cheng, Xiao-Jun Liu

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引用次数: 0

Abstract

Similar to optical spin-orbit interactions (SOIs), acoustic SOIs are anticipated to offer fresh perspectives and capabilities for acoustic manipulation beyond conventional scalar degrees of freedom. However, the acoustic extrinsic SOIs caused by particular properties of the medium were seldom explored. Here, the acoustic extrinsic SOI is observed in a double spiral acoustic beam (DSAB), as evidenced by the rotation of the spatial intensity pattern along the propagation axis. The interaction of the acoustic plane wave with the well-designed artificial flat structure generates two non-paraxial focused acoustic vortices (NFAVs) with different spin angular momentums. The coaxial coupling between them leads to acoustic spin-controlled orbital rotation (SOR). Theoretical formulations, supported by numerical simulations and experimental results, are provided to demonstrate the validity of acoustic SOR. Our work provides new perspectives and capabilities for understanding sound processing, and may open an avenue for the development of spin-orbit acoustics. Similar to optical spin-orbit interactions (SOIs), acoustic SOIs are anticipated to offer fresh perspectives and capabilities for acoustic manipulation beyond conventional scalar degrees of freedom. Here, the acoustic extrinsic SOI is observed in a double spiral acoustic beam (DSAB), as evidenced by the rotation of the spatial intensity pattern along the propagation axis.

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双螺旋声束中由自旋控制的轨道旋转

声学自旋轨道相互作用（SOIs）与光学自旋轨道相互作用（SOIs）类似，有望为声学操纵提供超越传统标量自由度的全新视角和能力。然而，由介质的特殊性质引起的声外 SOI 却很少被探索。在这里，我们在双螺旋声束（DSAB）中观察到了声学本征 SOI，其表现为空间强度模式沿传播轴的旋转。声平面波与精心设计的人工平面结构相互作用，产生了两个具有不同自旋角动量的非同轴聚焦声漩涡（NFAV）。它们之间的同轴耦合导致了声学自旋控制轨道旋转（SOR）。我们通过数值模拟和实验结果来证明声学自旋控制轨道旋转（SOR）的有效性。我们的工作为理解声音处理提供了新的视角和能力，并可能为自旋轨道声学的发展开辟一条途径。与光学自旋轨道相互作用（SOIs）类似，声学 SOIs 预计将为声学操纵提供超越传统标量自由度的全新视角和能力。在这里，我们在双螺旋声波束（DSAB）中观察到了声学外自旋轨道相互作用（SOI），沿传播轴旋转的空间强度模式就是证明。

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来源期刊

Communications Physics Physics and Astronomy-General Physics and Astronomy

CiteScore

8.40

自引率

3.60%

发文量

276

审稿时长

13 weeks

期刊介绍： Communications Physics is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of the physical sciences. Research papers published by the journal represent significant advances bringing new insight to a specialized area of research in physics. We also aim to provide a community forum for issues of importance to all physicists, regardless of sub-discipline. The scope of the journal covers all areas of experimental, applied, fundamental, and interdisciplinary physical sciences. Primary research published in Communications Physics includes novel experimental results, new techniques or computational methods that may influence the work of others in the sub-discipline. We also consider submissions from adjacent research fields where the central advance of the study is of interest to physicists, for example material sciences, physical chemistry and technologies.