Negative refraction of acoustic waves in two-dimensional phononic crystals
Negative refraction of acoustic waves in two-dimensional phononic crystals
复制标题
DOI：
10.1063/1.1772854
复制
发表时间：
2004-07-12
影响因子：
4
通讯作者：
Liu, ZY
中科院分区：
文献类型：
--
作者：
Zhang, XD;Liu, ZY
通过理论分析和数值模拟，证明了声波在二维声子晶体中的负折射现象。讨论了实现这种行为的方法。还设计了一种用于声波的微超透镜。结果表明，基于声子晶体的折射器件的行为方式类似于光学系统。因此，可以引入声波的有效密度的负平方根或负折射率来很好地描述这种现象，就像光子晶体中的电磁波一样。(C)2004年，美国物理学会。
Negative refraction of acoustic waves in two-dimensional phononic crystals has been demonstrated through both analysis and exact numerical simulation. The methods to achieve this behavior have been discussed. A microsuperlens for acoustic waves has also been designed. It is shown that refractive devices based on phononic crystals behave in a manner similar to that of optical systems. Therefore, a negative square root of the effective density or negative refraction index for acoustic waves can be introduced to describe this phenomena very well as the case of electromagnetic waves in the photonic crystals. (C) 2004 American Institute of Physics.