Extremely Bright THz Radiation from Two-color Filamentation of Mid-infrared Laser Pulses
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OSA 2018. We show numerically that two-color filamentation of mid-infrared 3.9 m laser pulses allows one to generate THz pulses of multi-millijoule energies and extreme conversion efficiencies, with electric and magnetic fields of GV/cm and kT level, exceeding by far any available quasi-DC field source today.