论文标题
电磁材料的时间边界
Temporal boundaries in electromagnetic materials
论文作者
论文摘要
时间调制的光学介质在摘要和应用应用中都很重要，例如时空变换光学，相对论激光 - 铂相互作用和动态超材料。在这里，我们研究了时间边界的行为，并表明传统的方法采用恒定的介电特性，并将损失作为虚构部分纳入，一定会导致非物理解决方案。此外，尽管可以通过窄带近似来恢复身体合理的预测，但我们表明，适当的模型应使用具有时间响应和分散行为的材料。
Temporally modulated optical media are important in both abstract and applied applications, such as spacetime transformation optics, relativistic laser-plasma interactions, and dynamic metamaterials. Here we investigate the behaviour of temporal boundaries, and show that traditional approaches that assume constant dielectric properties, with loss incorporated as an imaginary part, necessarily lead to unphysical solutions. Further, although physically reasonable predictions can be recovered with a narrowband approximation, we show that appropriate models should use materials with a temporal response and dispersive behaviour.
