| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Manipulating Backward Propagation of Acoustic Waves by a Periodical Structure |
| Zheng Xu1, Meng-Lu Qian1, Qian Cheng1**, Xiao-Jun Liu2** |
1Institute of Acoustics, Tongji University, Shanghai 200092
2School of Physics, Nanjing University, Nanjing 210093
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| Cite this article: |
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Zheng Xu, Meng-Lu Qian, Qian Cheng et al 2016 Chin. Phys. Lett. 33 114302 |
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Abstract In the backward propagation of acoustic waves, the direction of phase velocity is anti-parallel to that of group velocity. We propose a scheme to manipulate the backward propagation using a periodical structure. The dynamic backward propagation process is further experimentally observed. It is demonstrated that the oblique incident plane wave moves backward when it travels through the periodical structure and the backward shift can be controlled within a certain range.
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Received: 01 August 2016
Published: 28 November 2016
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| PACS: |
43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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43.20.+g
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(General linear acoustics)
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46.40.-f
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(Vibrations and mechanical waves)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11404245 and 11374231, the National High-Tech Research and Development Program of China under Grant No 2012AA022606, the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20130091130004, and the National Key Scientific Instrument and Equipment Development Project of China under Grant No 2012YQ15021306. |
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