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Tunable Broadband Acoustic Vortex Generator with Multiple Orders Based on Mie Resonances Structure
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2023-04-06 , DOI: 10.1002/admt.202202082 Chunxia Liu 1 , Yingrui Ye 1 , Jiu Hui Wu 1
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2023-04-06 , DOI: 10.1002/admt.202202082 Chunxia Liu 1 , Yingrui Ye 1 , Jiu Hui Wu 1
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Acoustic vortices are intensely researched in metasurfaces for their potential application in acoustic communication and particle manipulation. By elaborately designing acoustic metasurfaces with phase profiles, an acoustic vortex is obtained. However, most existing studies are limited to the single working frequency and the specific topological charge. To address these limitations, a tunable broadband acoustic vortex generator is designed to generate acoustic vortices with multiple orders. For this purpose, an annulus subwavelength Mie resonator is theoretically proposed first. In the Mie resonator, the multipole mode is excited by coupling eccentric monopole sources at related resonance frequencies. Then coupling the Mie resonance structure and two eccentric monopole sources can realize the multipole crossing, thus generating acoustic vortices with topological charge m of ±1, ±2, ±3, ±4, and ±5. Numerical simulations and an experiment further confirm the theory. In addition, frequency tunability, broadband characteristics, and system robustness are quantitatively studied. The designed vortex generator performs well on these characteristics, which may have potential applications in acoustic communication for multiplexing and demultiplexing.
中文翻译：
基于米氏共振结构的多阶可调谐宽带声涡发生器
超表面中的声涡旋因其在声学通信和粒子操纵中的潜在应用而受到深入研究。通过精心设计具有相位分布的声学超表面，获得了声学涡旋。然而，大多数现有研究仅限于单一工作频率和特定拓扑电荷。为了解决这些限制，设计了可调谐宽带声涡流发生器来生成多阶声涡流。为此，首先从理论上提出了环形亚波长米氏谐振器。在米氏谐振器中，通过在相关谐振频率下耦合偏心单极源来激发多极模式。然后将米氏共振结构与两个偏心单极子源耦合即可实现多极子交叉，m为±1、±2、±3、±4和±5。数值模拟和实验进一步证实了该理论。此外，还对频率可调谐性、宽带特性和系统鲁棒性进行了定量研究。设计的涡旋发生器在这些特性上表现良好，可能在复用和解复用的声学通信中具有潜在的应用。
更新日期：2023-04-06
中文翻译：
基于米氏共振结构的多阶可调谐宽带声涡发生器
超表面中的声涡旋因其在声学通信和粒子操纵中的潜在应用而受到深入研究。通过精心设计具有相位分布的声学超表面，获得了声学涡旋。然而，大多数现有研究仅限于单一工作频率和特定拓扑电荷。为了解决这些限制，设计了可调谐宽带声涡流发生器来生成多阶声涡流。为此，首先从理论上提出了环形亚波长米氏谐振器。在米氏谐振器中，通过在相关谐振频率下耦合偏心单极源来激发多极模式。然后将米氏共振结构与两个偏心单极子源耦合即可实现多极子交叉，m为±1、±2、±3、±4和±5。数值模拟和实验进一步证实了该理论。此外，还对频率可调谐性、宽带特性和系统鲁棒性进行了定量研究。设计的涡旋发生器在这些特性上表现良好，可能在复用和解复用的声学通信中具有潜在的应用。
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