Invariance of parameter identification in multiscales of meta-atoms in metamaterials
Invariance of parameter identification in multiscales of meta-atoms in metamaterials
复制标题
超材料元原子多尺度参数识别的不变性
DOI：
10.1080/23746149.2018.1433551
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
A. Iwai and Y. Omura
中科院分区：
文献类型：
--
作者：
O. Sakai;A. Iwai and Y. Omura
超材料的概念导致了波传播的非凡方案，已经用各种元原子（超材料的组成单位）进行了验证，并应用于物理学中的许多类别。虽然它的定义明确了元原子的最大尺寸是一个波长的一小部分，但其大小可能会有几个数量级的变化，比如从毫米（“宏观水平”）到原子尺度（“微观水平”）。本文综述了电磁超材料中介电常数和磁导率等参数组合在宏观和微观层面上的几种模式，并在超材料的概念下进行了类似的类比。到目前为止所报道的各种实验和理论工作都证明了这些值（介电常数、磁导率和折射率）的参数识别与元原子尺寸无关，并且具有波长数量级的空间积分过程的重要性。
The concept of metamaterials has led to extraordinary schemes of wave propagation, which has been verified using various meta-atoms, constituent units of metamaterials, as well as applied to a number of categories in physics. Although its definition clarifies the maximum size of meta-atoms as a fraction of one wavelength, the size may vary by several orders, like from millimeters (‘macroscopic level’) to atomic scales (‘microscopic level’) for microwaves. This review surveys several patterns of parameter combinations, like permittivity and permeability in electromagnetic metamaterials, which have been achieved at either macroscopic or microscopic levels, with the similar analogy under the concept of metamaterials. Various experimental and theoretical efforts reported so far and shown here verify that the parameter identification of these values (permittivity, permeability, and refractive index) is independent of meta-atom sizes, with importance of spatial integration procedure on the order of a wavelength.