| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Energy-distributable waterborne acoustic launcher for directional sensing |
| Tian Yang(杨天)1, Wenting Gao(高文婷)2, Shida Fan(范世达)1, Jie Ren(任捷)2, and Tianzhi Yang(杨天智)1,† |
1 School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
2 Center for Phononics and Thermal Energy Science, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China |
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Abstract Highly directional launch and intensity adjustment of underwater acoustic signals are crucial in many areas such as abyssal navigation, underwater signal communication, and detection for marine biology. Inspired by the phenomenon that aquatic animals like dolphins detect and track prey with high resolution, we propose an energy-distributable directional sensing strategy which can achieve parallel needle-like transmitting sound beams with adjustable energy based on out-coupling valley-polarized edge states. The acoustic spin angular momentum and energy flow distribution at different interfaces inside the phononic crystal are provided and they show tight coupling. Furthermore, a sound beam with a width of 20° and an acoustic intensity enhancement factor ≈6.6 are observed in the far field. As an application, we show that this device can be used as an acoustic energy distributor. This communication pattern with excellent functionalities and performance provides a desirable idea for high-energy-level directional collimated underwater sensing and underwater acoustic energy distribution.
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Received: 24 May 2023
Revised: 24 August 2023
Accepted manuscript online: 01 September 2023
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PACS:
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43.30.+m
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(Underwater sound)
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43.60.Vx
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(Acoustic sensing and acquisition)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos.12232014 and 12072221) and the Fundamental Research Funds for the Central Universities (Grant No.2013017). |
Corresponding Authors:
Tianzhi Yang
E-mail: yangtianzhi@me.neu.edu.cn
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Cite this article:
Tian Yang(杨天), Wenting Gao(高文婷), Shida Fan(范世达), Jie Ren(任捷), and Tianzhi Yang(杨天智) Energy-distributable waterborne acoustic launcher for directional sensing 2023 Chin. Phys. B 32 124302
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