Sound-transparent anisotropic media for backscattering-immune wave manipulation

doi:10.1088/1674-1056/ac4904

中国物理B ›› 2022, Vol. 31 ›› Issue (8): 84302-084302.doi: 10.1088/1674-1056/ac4904

Sound-transparent anisotropic media for backscattering-immune wave manipulation

Wei-Wei Kan(阚威威)^†, Qiu-Yu Li(李秋雨), and Lei Pan(潘蕾)

School of Science, Nanjing University of Science and Technology, Nanjing 210094, China

收稿日期:2021-11-04 修回日期:2021-12-26 接受日期:2022-01-07 出版日期:2022-07-18 发布日期:2022-07-18
通讯作者: Wei-Wei Kan E-mail:kan@njust.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11974186, 11604153, and 61975080), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20160818 and BK20200070), and the Open Research Foundation of Key Laboratory of Modern Acoustics, Ministry of Education.

Sound-transparent anisotropic media for backscattering-immune wave manipulation

Wei-Wei Kan(阚威威)^†, Qiu-Yu Li(李秋雨), and Lei Pan(潘蕾)

School of Science, Nanjing University of Science and Technology, Nanjing 210094, China

Received:2021-11-04 Revised:2021-12-26 Accepted:2022-01-07 Online:2022-07-18 Published:2022-07-18
Contact: Wei-Wei Kan E-mail:kan@njust.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11974186, 11604153, and 61975080), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20160818 and BK20200070), and the Open Research Foundation of Key Laboratory of Modern Acoustics, Ministry of Education.

摘要/Abstract

摘要： The scattering behavior of an anisotropic acoustic medium is analyzed to reveal the possibility of routing acoustic signals through the anisotropic layers with no backscattering loss. The sound-transparent effect of such a medium is achieved by independently modulating the anisotropic effective acoustic parameters in a specific order, and is experimentally observed in a bending waveguide by arranging the subwavelength structures in the bending part according to transformation acoustics. With the properly designed filling structures, the original distorted acoustic field in the bending waveguide is restored as if the wave travels along a straight path. The transmitted acoustic signal is maintained nearly the same as the incident modulated Gaussian pulse. The proposed schemes and the supporting results could be instructive for further acoustic manipulations such as wave steering, cloaking and beam splitting.

关键词: sound-transparent anisotropic media, acoustic bending waveguide, transformation acoustics

Abstract: The scattering behavior of an anisotropic acoustic medium is analyzed to reveal the possibility of routing acoustic signals through the anisotropic layers with no backscattering loss. The sound-transparent effect of such a medium is achieved by independently modulating the anisotropic effective acoustic parameters in a specific order, and is experimentally observed in a bending waveguide by arranging the subwavelength structures in the bending part according to transformation acoustics. With the properly designed filling structures, the original distorted acoustic field in the bending waveguide is restored as if the wave travels along a straight path. The transmitted acoustic signal is maintained nearly the same as the incident modulated Gaussian pulse. The proposed schemes and the supporting results could be instructive for further acoustic manipulations such as wave steering, cloaking and beam splitting.

Key words: sound-transparent anisotropic media, acoustic bending waveguide, transformation acoustics

中图分类号: (General linear acoustics)

43.20.-f

43.20.+g (General linear acoustics) 43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound)

Wei-Wei Kan(阚威威), Qiu-Yu Li(李秋雨), and Lei Pan(潘蕾). Sound-transparent anisotropic media for backscattering-immune wave manipulation[J]. 中国物理B, 2022, 31(8): 84302-084302.

Wei-Wei Kan(阚威威), Qiu-Yu Li(李秋雨), and Lei Pan(潘蕾). Sound-transparent anisotropic media for backscattering-immune wave manipulation[J]. Chin. Phys. B, 2022, 31(8): 84302-084302.

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Sound-transparent anisotropic media for backscattering-immune wave manipulation

Sound-transparent anisotropic media for backscattering-immune wave manipulation

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