| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Using Helmholtz resonator arrays to improve dipole transmission efficiency in waveguide |
| Liwei Wang(王力维)1, Li Quan(全力)2, Feng Qian(钱枫)1,3, Xiaozhou Liu(刘晓宙)1 |
1 Key Laboratory of Modern Acoustics(Ministry of Education), Institute of Acoustics and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
2 Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78713, USA;
3 College of Physics & Electronic Engineering, Changshu Institute of Technology, Changshu 215500, China |
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Abstract It is well known that the radiation efficiency of an acoustic dipole is very low, increasing the radiation efficiency of an acoustic dipole is a difficult task, especially in an ordinary waveguide. In addition, current acoustic superlenses all utilize in-phase sources to do the super-resolution imaging, it is almost impossible to realize super-resolution imaging of an acoustic dipole. In this paper, after using the Helmholtz resonator arrays (HRAs) which are placed at the upper and lower surfaces of the waveguide, we observe a large dipole radiation efficiency at the certain frequency, which gives a method to observe an acoustic dipole in the far field and offers a novel model which is promising to realize the superlens with a source of an acoustic dipole. We discuss how the arrangement of HRAs affects the transmission of the acoustic dipole.
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Received: 04 June 2019
Revised: 08 July 2019
Accepted manuscript online:
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PACS:
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43.40.-r
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(Structural acoustics and vibration)
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43.58.Ls
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(Acoustical lenses and microscopes)
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43.40.+s
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(Structural acoustics and vibration)
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| Fund: Project supported by the National Key R&D Program of China (Grant No. 2017YFA0303702), State Key Program of the National Natural Science Foundation of China (Grant No. 11834008), the National Natural Science Foundation of China (Grant No. 11774167), State Key Laboratory of Acoustics, Chinese Academy of Sciences (Grant No. SKLA201809), Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences (Grant No. SSHJ-KFKT-1701), and AQSIQ Technology R&D Program, China (Grant No. 2017QK125). |
Corresponding Authors:
Xiaozhou Liu
E-mail: xzliu@nju.edu.cn
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Cite this article:
Liwei Wang(王力维), Li Quan(全力), Feng Qian(钱枫), Xiaozhou Liu(刘晓宙) Using Helmholtz resonator arrays to improve dipole transmission efficiency in waveguide 2019 Chin. Phys. B 28 094301
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