时变反应边界上表面波的频散
Dispersion of Surface Waves above Time-Varying Reactive Boundaries
摘要：
在这篇演讲中，我们解析地推导出沿反应边界传播的表面波的色散方程，这些边界在时间上是周期性调制的。此外，我们展示了色散曲线的数值结果，重要的是揭示了时变边界产生的带隙可以通过工程调制谱来控制。此外，我们还指出了一个有趣的效果场放大有关的表面波的存在这样的带隙。放大的效果不需要信号和泵浦波的同步。这种独特的性质在微波到光频的表面波通信中有着广阔的应用前景。
英文摘要：
In this presentation, we analytically derive the dispersion equation for surface waves traveling along reactive boundaries which are periodically modulated in time. In addition, we show numerical results for the dispersion curves and importantly uncover that time-varying boundaries generate band gaps that can be controlled by engineering the modulation spectrum. Furthermore, we also point out an interesting effect of field amplification related to the existence of such band gaps for surface waves. The effect of amplification does not require the synchronization of signal and pumping waves. This unique property is very promising to be applied in surface-wave communications from microwave to optical frequencies.
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