EUROPHOTON 2022

We present the first experimental demonstration of direct light waveform control over collective relativistic electron motion during ultra-high intensity laser-matter interactions driven by near-single-cycle laser transients.

We report on two efficient XUV out-coupling methods highly suitable for intra-oscillator HHG. We demonstrate for the first time XUV cavity out-coupling using a coated grazing-incidence plate. We further show a preliminary operation with a pierced mirror reaching 1-GW of intracavity peak power highly suitable for HHG.