超光速矩形脉冲调制介质中的波偏转和移位重聚焦
Wave Deflection and Shifted Refocusing in a Medium Modulated by a Superluminal Rectangular Pulse
摘要：
研究了矩形超光速脉冲调制介质的散射问题，脉冲调制是通过横向激励实现的。我们解决了这个问题，在移动帧中的调制出现纯粹的时间，因为解决方案，一个纯粹的时间调制是已知的。在此基础上，我们用图解法求出了斜入射时调制散射波的角度和频率。这项研究表明，超光速调制偏转平面波后向，并重新聚焦柱面波的空间相对于原来的源移动的点。
英文摘要：
We explore the problem of scattering in a medium modulated by a superluminal rectangular pulse, with the pulse modulation realized through transverse excitations. We solve this problem in the moving frame where the modulation appears purely temporal, since the solution to a purely temporal modulation is known. Upon this basis, we use a graphical approach to find the angle and frequency of the wave scattered by the modulation under oblique incidence. This study reveals that superluminal modulations deflect plane waves retro-directively, and refocus cylindrical waves to a shifted point of space with respect to the original source.
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