Broadband high-efficiency acoustic vortices via a topology-optimized space-coiling-cavity metasurface

Shi Wang Fan; Wen Qi Wang; Hao Wen Dong; Jinxi Liu; Hao Bo Qi; Yue Sheng Wang

doi:10.1063/5.0154688

Broadband high-efficiency acoustic vortices via a topology-optimized space-coiling-cavity metasurface

Shi Wang Fan, Wen Qi Wang, Hao Wen Dong^*, Jinxi Liu^*, Hao Bo Qi, Yue Sheng Wang

^*Corresponding author for this work

Institute of Advanced Structure Technology

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Acoustic vortices carrying orbital angular momentum are significant in wave-matter interactions, allowing for versatile devices with promising applications. However, current metasurface-based vortex generators have limited bandwidth, operating within a narrow frequency range. Here, we propose a broadband acoustic metasurface with four space-coiling-cavity units through the bottom-up topology optimization. These units have constant phase differences with high-efficiency transmission (>0.8) over a desired frequency range [3.0, 4.0] kHz, indicating the unique wideband vortex response of their assembled metasurfaces. Our simulations and experiments further demonstrate this excellent performance. This breakthrough in broadband vortices allows for the development of devices like acoustic tweezers, antennas, and spanners.

Original language	English
Article number	102202
Journal	Applied Physics Letters
Volume	123
Issue number	10
DOIs	https://doi.org/10.1063/5.0154688
Publication status	Published - 4 Sept 2023

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title = "Broadband high-efficiency acoustic vortices via a topology-optimized space-coiling-cavity metasurface",

abstract = "Acoustic vortices carrying orbital angular momentum are significant in wave-matter interactions, allowing for versatile devices with promising applications. However, current metasurface-based vortex generators have limited bandwidth, operating within a narrow frequency range. Here, we propose a broadband acoustic metasurface with four space-coiling-cavity units through the bottom-up topology optimization. These units have constant phase differences with high-efficiency transmission (>0.8) over a desired frequency range [3.0, 4.0] kHz, indicating the unique wideband vortex response of their assembled metasurfaces. Our simulations and experiments further demonstrate this excellent performance. This breakthrough in broadband vortices allows for the development of devices like acoustic tweezers, antennas, and spanners.",

author = "Fan, {Shi Wang} and Wang, {Wen Qi} and Dong, {Hao Wen} and Jinxi Liu and Qi, {Hao Bo} and Wang, {Yue Sheng}",

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AU - Fan, Shi Wang

AU - Wang, Wen Qi

AU - Dong, Hao Wen

AU - Liu, Jinxi

AU - Qi, Hao Bo

AU - Wang, Yue Sheng

PY - 2023/9/4

Y1 - 2023/9/4

N2 - Acoustic vortices carrying orbital angular momentum are significant in wave-matter interactions, allowing for versatile devices with promising applications. However, current metasurface-based vortex generators have limited bandwidth, operating within a narrow frequency range. Here, we propose a broadband acoustic metasurface with four space-coiling-cavity units through the bottom-up topology optimization. These units have constant phase differences with high-efficiency transmission (>0.8) over a desired frequency range [3.0, 4.0] kHz, indicating the unique wideband vortex response of their assembled metasurfaces. Our simulations and experiments further demonstrate this excellent performance. This breakthrough in broadband vortices allows for the development of devices like acoustic tweezers, antennas, and spanners.

AB - Acoustic vortices carrying orbital angular momentum are significant in wave-matter interactions, allowing for versatile devices with promising applications. However, current metasurface-based vortex generators have limited bandwidth, operating within a narrow frequency range. Here, we propose a broadband acoustic metasurface with four space-coiling-cavity units through the bottom-up topology optimization. These units have constant phase differences with high-efficiency transmission (>0.8) over a desired frequency range [3.0, 4.0] kHz, indicating the unique wideband vortex response of their assembled metasurfaces. Our simulations and experiments further demonstrate this excellent performance. This breakthrough in broadband vortices allows for the development of devices like acoustic tweezers, antennas, and spanners.

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Broadband high-efficiency acoustic vortices via a topology-optimized space-coiling-cavity metasurface

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