论文标题
控制表面不连续性的表面波
Controlling surface waves with temporal discontinuities of metasurfaces
论文作者
论文摘要
在本文中，当表面阻抗发生时间突然变化时，我们研究了反应性阻抗边界上表面波的散射。我们报告了三种外来波浪现象。首先，表明，通过切换边界表面电容的值，可以完全控制表面波的速度，并扩增反射和透射的表面波的功率。其次，我们表明，当电容边界切换到电感边界时，表面波完全停止，“冷冻”静态磁场分布。静态磁场是“熔体”，当边界切换回电容性时，恢复了表面波。第三，我们表明边界阻抗的暂时跳跃将循环自由空间传播到表面波，这是对空间棱镜的类似物。这些有趣的效果通过跨表面属性的时间跳跃启用，为生成和控制表面波打开了新的可能性。
In this paper, we investigate the scattering of surface waves on reactive impedance boundaries when the surface impedance undergoes a sudden change in time. We report three exotic wave phenomena. First, it is shown that by switching the value of the surface capacitance of the boundary, the velocity of surface waves can be fully controlled, and the power of reflected and transmitted surface waves are amplified. Second, we show that when a capacitive boundary is switched to an inductive one, the surface wave stops completely, with a "frozen" static magnetic field distribution. The static magnetic fields are "melt" and restore propagating surface waves when the boundary is switched back to a capacitive one. Third, we show that temporal jumps of the boundary impedance couple free-space propagating waves to the surface wave, which is an analog to a spatial prism. These interesting effects enabled by temporal jumps of metasurface properties open up new possibilities for the generation and control of surface waves.
