Manipulating Backward Propagation of Acoustic Waves by a Periodical Structure
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 periodicM structure. The dynamic backward propagation process is further experimentally observed. It is demons...
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| Published in | Chinese physics letters Vol. 33; no. 11; pp. 58 - 61 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.11.2016
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| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/33/11/114302 |
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| Summary: | 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 periodicM 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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| Bibliography: | 11-1959/O4 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 periodicM 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. Zheng Xu1, Meng-Lu Qian1, Qian Cheng1, Xiao-Jun Liu2（1Institute of Acoustics, Tongji University, Shanghai 200092;2School of Physics, Nanjing University, Nanjing 210093） |
| ISSN: | 0256-307X 1741-3540 |
| DOI: | 10.1088/0256-307X/33/11/114302 |