Graded Quasiperiodic Metamaterials Perform Fractal Rainbow Trapping
Graded Quasiperiodic Metamaterials Perform Fractal Rainbow Trapping
复制标题
分级准周期超材料执行分形彩虹捕获
DOI：
10.1103/physrevlett.131.177001
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发表时间：
2023
影响因子：
8.6
通讯作者：
Davies B
中科院分区：
文献类型：
--
作者：
Davies B
梯度异向材料的彩虹捕获现象可以与准周期波导的分形谱相结合，得到一种具有分形彩虹捕获的异向材料。这是通过分级切割和投影算法来实现的，该算法产生有效投影角沿其长度沿着分级的几何形状。其结果是，局部带隙的分形结构随位置而变化，导致宽带“分形”彩虹陷阱。我们证明了这一原则，通过设计一个声波导，其特征在于使用理论，仿真和实验。
The rainbow trapping phenomenon of graded metamaterials can be combined with the fractal spectra of quasiperiodic waveguides to give a metamaterial that performs fractal rainbow trapping. This is achieved through a graded cut-and-project algorithm that yields a geometry for which the effective projection angle is graded along its length. As a result, the fractal structure of local band gaps varies with position, leading to broadband “fractal” rainbow trapping. We demonstrate this principle by designing an acoustic waveguide, which is characterised using theory, simulation and experiments.