Method for retrieving effective properties of locally resonant acoustic metamaterials
Method for retrieving effective properties of locally resonant acoustic metamaterials
复制标题
DOI：
10.1103/physrevb.76.144302
复制
发表时间：
2007-10-01
影响因子：
3.7
通讯作者：
Zhang, Xiang
中科院分区：
文献类型：
--
作者：
Fokin, Vladimir;Ambati, Muralidhar;Zhang, Xiang
声学超材料可以用有效的材料性质如质量密度和模量来描述。我们已经开发出一种方法来提取这些有效的反射和透射系数，这可以通过实验测量的属性。讨论了声学超材料的有效特性与边界位置的关系，提出了一种确定边界的方法。利用该方法分析了各种声学超材料，并报道了具有负有效特性的超材料。
Acoustic metamaterials can be described by effective material properties such as mass density and modulus. We have developed a method to extract these effective properties from reflection and transmission coefficients, which can be measured experimentally. The dependency of effective properties on the positions of the boundaries of the acoustic metamaterial is discussed, and a proper procedure to determine the boundaries is presented. This retrieval method is used to analyze various acoustic metamaterials, and metamaterials with negative effective properties are reported.