论文标题
由时空调制步骤形成的移动接口处的临界角度
Critical Angle at a Moving Interface Formed by a Space-Time Modulation Step
论文作者
论文摘要
本文解决了由时空调制步骤形成的移动界面处波浪散射的问题。具体而言，它使用洛伦兹转换的框架跳跃技术来得出，这是相应的临界角度的公式，超出了传输场是evaneScent的。它表明，该角度比$π/2 $（界面的位置）小（大于界面的位置），用于与波传播方向进行编码（矛盾的）调制，并且关键角度与调制速度函数单调函数单调降低到零在事件波动中无法与任何界面相关的速度。该理论通过全波FDTD模拟进行了说明和验证。
This paper addresses the problem of wave scattering at a moving interface formed by a space-time modulation step. Specifically, it derives, using the technique of frame hopping with Lorentz transformation, the formula for the corresponding critical angle beyond which the transmitted field is evanescent. It shows that this angle is smaller (resp. larger) than $π/2$ (position of the interface) for a modulation that is codirectional (resp. contradirectional) to the direction of wave propagation, and that the critical angle versus the modulation velocity function monotonically decreases to zero at the velocity where the incident wave cannot catch up any more with the interface. The theory is illustrated and validated by full-wave FDTD simulation.
