Acoustic waves splitter employing orbital angular momentum

被引:16
|
作者
Liu, Fengming [1 ]
Li, Weiping [2 ,3 ]
Pu, Zhenhang [2 ,3 ]
Ke, Manzhu [2 ,3 ]
机构
[1] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Hubei, Peoples R China
[2] Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Hubei, Peoples R China
[3] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
D O I
10.1063/1.5094520
中图分类号
O59 [应用物理学];
学科分类号
摘要
A sound splitter using the orbital angular momentum (OAM) of acoustic vortices is proposed and experimentally demonstrated. We show that a helical waveguide with a periodic array of shunted tubes can be used to achieve different transmission spectra for the acoustic vortices with opposite OAM topological charges due to their different Bragg scattering type bandgaps. By symmetry, the transmission spectra will reverse if the handedness of the helical waveguides is changed. Therefore, two such composite waveguides with opposite handedness can be combined to separate the OAM-dependent flow of sound. Our study of the acoustic vortex splitter may provide a route for demultiplexing in acoustic OAM-based communication.
引用
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页数:4
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