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

Abstract

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.

9 pages, 3 figures

References in corpus (4)

• Ion acceleration by superintense laser-plasma interaction
• Terahertz-driven linear electron acceleration
• Extremely Nonperturbative Nonlinearities in GaAs Driven by Atomically Strong Terahertz Fields in Gold Metamaterials
• Quasi-phase-matching high-harmonic radiation using chirped THz pulses

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• Development of a hardened THz energy meter for use on the kilojoule-scale, short-pulse OMEGA EP laser
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• 1.4-mJ High Energy Terahertz Radiation from Lithium Niobates
• Electromagnetic emission due to nonlinear interaction of laser wakefields colliding in plasma at an oblique angle
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