聚焦X形（超光速）脉冲
Focused X-shaped (Superluminal) pulses
摘要：
局部X形脉冲的（连续）序列的时空聚焦通过在它们的速度上适当地积分来获得，即，在它们的轴棱锥角上，因此概括了先前的（离散的）方法。首先，构建新的超光速波脉冲，然后在这样的波中进行调整，使它们在时间上聚焦在选定的空间点，在那里波场可以在短时间内达到非常高的强度。这类结果可以在许多领域找到应用，除了电磁学和光学，包括声学，引力和基本粒子物理。PACS编号：41.20.Jb; 03.50.De; 03.30.+ p; 84.40.Az; 42.82.Et; 83.50.Vr; 62.30.+ d; 43.60 +. d、91.30.Fn、04.30.Nk、42.25.Bs、46.40.Cd、52.35.Lv.保留字：麦克斯韦方程的定域解;超光速波;贝塞尔光束;有限衍射脉冲;电磁波; X形波;电磁学;微波;光学;狭义相对论;定域声波;地震波;机械波;基本粒子物理学;引力波
英文摘要：
The space-time focusing of a (continuous) succession of localized X-shaped pulses is obtained by suitably integrating over their speed, i.e., over their axicon angle, thus generalizing a previous (discrete) approach. First, new Superluminal wave pulses are constructed, and then tailored in such a wave to get them temporally focused at a chosen spatial point, where the wavefield can reach for a short time very high intensities. Results of this kind may find applications in many fields, besides electromagnetism and optics, including acoustics, gravitation, and elementary particle physics. PACS nos.: 41.20.Jb; 03.50.De; 03.30.+p; 84.40.Az; 42.82.Et; 83.50.Vr; 62.30.+d; 43.60.+d; 91.30.Fn; 04.30.Nk; 42.25.Bs; 46.40.Cd; 52.35.Lv. Keywords: Localized solutions to Maxwell equations; Superluminal waves; Bessel beams; Limited-diffraction pulses; Finite-energy waves; Electromagnetic wavelets; X-shaped waves; Electromagnetism; Microwaves; Optics; Special relativity; Localized acoustic waves; Seismic waves; Mechanical waves; Elementary particle physics; Gravitational waves
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