Generation of High-Power Terahertz Radiation Using High-Intensity Femtosecond Laser Pulses

The generation of high-power controllable terahertz radiation by discharge currents excited due to the irradiation of an extended target of a given configuration by multipetawatt laser pulses is considered. It is shown that the use of several laser pulses makes it possible to proportionally increase the intensity of the emitted terahertz pulses at a radiation conversion coefficient of several percent. A scheme is proposed for the interference-based amplification of terahertz pulses in a given direction upon synchronous irradiation of several identical targets.