非对称波导网络中的等反射性与定制化非平衡相干完美吸收
Equireflectionality and customized unbalanced coherent perfect absorption in asymmetric waveguide networks
AI总结：
该研究在非对称一维波导网络中发现潜在对称可实现宽带等反射性，提出标度共谱性实现可控非平衡相干完美吸收，为非对称可调波操控器件设计提供新方法。
摘要：
我们探究了经设计的非对称一维波导网络中的波散射现象。研究表明，当端口间满足所谓的“潜在对称”条件时，非对称网络的两个端口之间的反射率可在很宽的频率范围内保持一致，就如同该网络具有镜像对称性一样。我们通过声波导的数值模拟以及微波传输线网络的实验测量，验证了这种宽带等反射性。此外，通过对潜在对称进行推广，我们研究了N端口散射矩阵S的性质。当S的幂次满足我们称之为“标度共谱性”的特定关系时，该结构必然至少存在一个S的零本征值，从而具备相干完美吸收特性。更重要的是，标度共谱性引入了一个标度因子，用于调控待吸收入射波的非对称性。我们的发现为非对称结构中可调谐波操控器件的设计提供了一种新方法。正如我们的声学模拟和微波实验所证实的，该方法的普适性使其潜在应用可拓展至广泛的物理系统。
英文摘要：
We explore the scattering of waves in designed asymmetric one-dimensional waveguide networks. We show that the reflection between two ports of an asymmetric network can be identical over a broad frequency range, as if the network was mirror-symmetric, under the condition of so-called latent symmetry between the ports. This broadband equireflectionality is validated numerically for acoustic waveguides and experimentally through measurements on microwave transmission-line networks. In addition, introducing a generalization of latent symmetry, we study the properties of an $N$-port scattering matrix $S$. When the powers of $S$ fulfill certain relations, which we coin scaled cospectrality, the setup is guaranteed to possess at least one zero eigenvalue of $S$, so that the setup features coherent perfect absorption. More importantly, scaled cospectrality introduces a scaling factor which controls the asymmetry of the incoming wave to be absorbed. Our findings introduce a novel approach for designing tunable wave manipulation devices in asymmetric setups. As evidenced by our acoustic simulations and microwave experiments, the generality of our approach extends its potential applications to a wide range of physical systems.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
