首页|Refined acoustic holography via nonlocal metasurfaces

Refined acoustic holography via nonlocal metasurfaces

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Holography can provide the desired wavefront phase and/or amplitude for imaging,particle manipulation,bacteria trapping,and cell patterning in optics and acoustics.However,previous work on acoustic holography is mostly based on local design opti-mization,either using active control of the sound source or relying on the structural design to provide the desired wavefront.Achieving precise control over the acoustic field remains a significant challenge.Here,we realize refined single-plane sym-metric binary amplitude,asymmetric intensity gradient amplitude,and bi-objective hologram through the non-local holographic imaging theory that considers the acoustic coupling of structural units in detail.By taking into account the self-radiation and mutual radiation between many small units on a plate of well-designed thickness,as well as the transmission through the plate's apertures,we can effectively regulate the sound field behind the plate.We demonstrate the effectiveness of our approach through numerical simulations and experiments,showcasing a circle,a black hole,and a bi-objective with a circle and a square hologram.Notably,the acoustic black hole hologram precisely reconstructs the intensity gradient distribution at two bright spots.This non-local holographic imaging theory is valuable for the fine-intensity regulation of the sound field and is expected to be applied in ultrasound diagnosis and treatment,medical imaging,and other fields.

acoustic hologramsnon-local interactionsfine intensity modulationacoustic metasurfaces

Shuhuan Xie、Hongyu Ma、Junmei Cao、Fangshuo Mo、Qian Cheng、Yong Li、Tong Hao

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Institute of Acoustics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China

Center for Spatial Information Science and Sustainable Development Applications,Tongji University,Shanghai 200092,China

College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China

National Key R&D Program of ChinaNational Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanghai Science and Technology Committee

2020YFA02114002020YFA02114024207417911774266922632081207428621JC1405600

2024

10.1007/s11433-023-2359-6

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(7)