Abstract-THz pulses over 50 millijoules generated from relativistic picosecond laser-plasma interactions

Guoqian Liao, Yutong Li, Hao Liu, Jie Zhang,

https://www.researchgate.net/publication/325118432_THz_pulses_over_50_millijoules_generated_from_relativistic_picosecond_laser-plasma_interactions

Ultrahigh-power terahertz (THz) radiation sources are essential for many applications, such as nonlinear THz physics, THz-wave based compact accelerators, etc. However, until now none of THz sources reported, whether based upon large-scale accelerators or high power lasers, have produced THz pulses with energies above the millijoule (mJ) barrier. Here we report on the efficient generation of low-frequency (<3 THz) THz pulses with unprecedentedly high energies over 50 mJ. The THz radiation is produced by coherent transition radiation of a picosecond laser-accelerated ultra-bright bunch of relativistic electrons from a solid target. Such high energy THz pulses can not only trigger various nonlinear dynamics in matter, but also open up a new research field of relativistic THz optics