Manipulating Backward Propagation of Acoustic Waves by a Periodical Structure
Manipulating Backward Propagation of Acoustic Waves by a Periodical Structure
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通过周期结构操纵声波的反向传播
DOI：
10.1088/0256-307x/33/11/114302
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发表时间：
2016
影响因子：
3.5
通讯作者：
Liu Xiao-Jun
中科院分区：
文献类型：
--
作者：
Xu Zheng;Qian Meng-Lu;Cheng Qian;Liu Xiao-Jun
在声波的后向传播中，相速度的方向与群速度的方向是反平行的。我们提出了一个计划来操纵使用周期性结构的反向传播。进一步实验观察了动态反向传播过程。结果表明，斜入射平面波通过周期性结构后向移动，且后向移动可以控制在一定范围内。
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.