Joule-class THz pulses from microchannel targets

Inference of joule -class THz radiation sources from microchannel targets driven with hundreds of joule, picosecond lasers is reported. THz sources of this magnitude are useful for nonlinear pumping of matter and for chargedparticle acceleration and manipulation. Microchannel targets demonstrate increased laser-THz conversion efficiency compared to planar foil targets, with laser energy to THz energy conversion up to similar to 0.9% in the best cases. (c) 2024 Optica Publishing Group