Experimental realization of fractal fretwork metasurface for sound anomalous modulation

doi:10.1088/1674-1056/ad2dcd

中国物理B ›› 2024, Vol. 33 ›› Issue (5): 54301-054301.doi: 10.1088/1674-1056/ad2dcd

Experimental realization of fractal fretwork metasurface for sound anomalous modulation

Jiajie He(何佳杰)¹, Shumeng Yu(于书萌)¹, Xue Jiang(江雪)^1,†, and Dean Ta(他得安)^1,2,‡

1 Department of Biomedical Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China;
2 Academy for Engineering and Technology, Fudan University, Shanghai 200433, China

收稿日期:2024-01-15 修回日期:2024-02-24 接受日期:2024-02-28 出版日期:2024-05-20 发布日期:2024-05-20
通讯作者: Xue Jiang, Dean Ta E-mail:xuejiang@fudan.edu.cn;tda@fudan.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1404500), the National Natural Science Foundation of China (Grant Nos. T2222024 and 12034005), the STCSM Science and Technology Innovation Plan of Shanghai Science and Technology Commission (Grant Nos. 20ZR1404200 and 21JC1400300).

Experimental realization of fractal fretwork metasurface for sound anomalous modulation

Jiajie He(何佳杰)¹, Shumeng Yu(于书萌)¹, Xue Jiang(江雪)^1,†, and Dean Ta(他得安)^1,2,‡

1 Department of Biomedical Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China;
2 Academy for Engineering and Technology, Fudan University, Shanghai 200433, China

Received:2024-01-15 Revised:2024-02-24 Accepted:2024-02-28 Online:2024-05-20 Published:2024-05-20
Contact: Xue Jiang, Dean Ta E-mail:xuejiang@fudan.edu.cn;tda@fudan.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1404500), the National Natural Science Foundation of China (Grant Nos. T2222024 and 12034005), the STCSM Science and Technology Innovation Plan of Shanghai Science and Technology Commission (Grant Nos. 20ZR1404200 and 21JC1400300).

摘要/Abstract

摘要： Natural creatures and ancient cultures are full of potential sources to provide inspiration for applied sciences. Inspired by the fractal geometry in nature and the fretwork frame in ancient culture, here we design the acoustic metasurface to realize sound anomalous modulation, which manifests itself as an incident-dependent propagation behavior: sound wave propagating in the forward direction is allowed to transmit with high efficiency while in the backward direction is obviously suppressed. We quantitatively investigate the dependences of asymmetric transmission on the propagation direction, incident angle and operating frequency by calculating sound transmittance and energy contrast. This compact fractal fretwork metasurface for acoustic anomalous modulation would promote the development of integrated acoustic devices and expand versatile applications in acoustic communication and information encryption.

关键词: acoustic metasurface, fractal geometry, sound anomalous modulation

Abstract: Natural creatures and ancient cultures are full of potential sources to provide inspiration for applied sciences. Inspired by the fractal geometry in nature and the fretwork frame in ancient culture, here we design the acoustic metasurface to realize sound anomalous modulation, which manifests itself as an incident-dependent propagation behavior: sound wave propagating in the forward direction is allowed to transmit with high efficiency while in the backward direction is obviously suppressed. We quantitatively investigate the dependences of asymmetric transmission on the propagation direction, incident angle and operating frequency by calculating sound transmittance and energy contrast. This compact fractal fretwork metasurface for acoustic anomalous modulation would promote the development of integrated acoustic devices and expand versatile applications in acoustic communication and information encryption.

Key words: acoustic metasurface, fractal geometry, sound anomalous modulation

中图分类号: (General linear acoustics)

43.20.+g

43.28.+h (Aeroacoustics and atmospheric sound)

Jiajie He(何佳杰), Shumeng Yu(于书萌), Xue Jiang(江雪), and Dean Ta(他得安). Experimental realization of fractal fretwork metasurface for sound anomalous modulation[J]. 中国物理B, 2024, 33(5): 54301-054301.

Jiajie He(何佳杰), Shumeng Yu(于书萌), Xue Jiang(江雪), and Dean Ta(他得安). Experimental realization of fractal fretwork metasurface for sound anomalous modulation[J]. Chin. Phys. B, 2024, 33(5): 54301-054301.

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Experimental realization of fractal fretwork metasurface for sound anomalous modulation

Experimental realization of fractal fretwork metasurface for sound anomalous modulation

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