论文标题
具有均匀时间调制的双异性系统中的非肾脏
Nonreciprocity in Bianisotropic Systems with Uniform Time Modulation
论文作者
论文摘要
随时间调制具有材料特性的物理系统提供了用于设计无磁性非注册设备的多功能路线。传统上，在这种系统中的非股展是利用时间和空间调制的，这不可避免地需要一系列分布在太空中的时间调整元素。在本文中，我们介绍了一个双性异性时间调节系统的概念，该系统能够在基本频率和基于均匀的，纯粹的时间材料调制的基础上进行非偏置波传播。在没有时间调制的情况下，所考虑的双异型系统是相互的。从理论上讲，我们通过分析无界双异构性时间调节培养基中的波传播来解释非偏置效应。该作用源于空间分散效应的时间调节，迄今为止，这些效应在先前的研究中尚未根据局部渗透性描述考虑。我们提出了双异型跨表面的电路设计，该电路可以提供相位不敏感的隔离和单向扩增。
Physical systems with material properties modulated in time provide versatile routes for designing magnetless nonreciprocal devices. Traditionally, nonreciprocity in such systems is achieved exploiting both temporal and spatial modulations, which inevitably requires a series of time-modulated elements distributed in space. In this paper, we introduce a concept of bianisotropic time-modulated systems capable of nonreciprocal wave propagation at the fundamental frequency and based on uniform, solely temporal material modulations. In the absence of temporal modulations, the considered bianisotropic systems are reciprocal. We theoretically explain the nonreciprocal effect by analyzing wave propagation in an unbounded bianisotropic time-modulated medium. The effect stems from temporal modulation of spatial dispersion effects which to date were not taken into account in previous studies based on the local-permittivity description. We propose a circuit design of a bianisotropic metasurface that can provide phase-insensitive isolation and unidirectional amplification.
