论文标题
从时间变化的跨额及其应用于自调整时空波动操作中提取等效允许的方法
Method for Extracting the Equivalent Admittance from Time-Varying Metasurfaces and Its Application to Self-Tuned Spatiotemporal Wave Manipulation
论文作者
论文摘要
凭借其自调整的时间变化响应，带有非线性电子设备的波形选择性元面积显示出迷人的应用，包括根据脉冲宽度区分不同的电磁波。但是，到目前为止，它们只有在空间均匀的散射曲线上才实现。在这里，通过将元表面建模为随时间变化的入学表，我们提供了一种分析计算方法来预测跨表面时间域的响应。这允许以等效板的形式推导设计规范，这在合成具有时空控制的元表面，例如实现具有规定的时间依赖性衍射特性的跨表面。例如，基于提出的等效入学表建模，我们合成了一个波形选择性领板板，其焦距可变，具体取决于进入的脉冲宽度。提出的依赖脉冲依赖性跨膜的合成方法可以扩展到设计具有更复杂时空波动操作的跨腹面积，从而使应用程序（例如传感，无线通信和信号处理）受益。
With their self-tuned time-varying responses, waveform-selective metasurfaces embedded with nonlinear electronics have shown fascinating applications, including distinguishing different electromagnetic waves depending on the pulse width. However, thus far they have only been realized with a spatially homogeneous scattering profile. Here, by modeling a metasurface as time-varying admittance sheets, we provide an analytical calculation method to predict the metasurface time-domain responses. This allows derivation of design specifications in the form of equivalent sheet admittance, which is useful in synthesizing a metasurface with spatiotemporal control, such as to realize a metasurface with prescribed time-dependent diffraction characteristics. As an example, based on the proposed equivalent admittance sheet modeling, we synthesize a waveform-selective Fresnel zone plate with variable focal length depending on the incoming pulse width. The proposed synthesis method of pulse-width-dependent metasurfaces may be extended to designing metasurfaces with more complex spatiotemporal wave manipulation, benefiting applications such as sensing, wireless communications and signal processing.
