Megawatt level surface high-harmonic generation from thin, replenishing, solid tapes

Abstract

A high-flux high-order harmonic source Review of Scientific Instruments 84, 073103 (2013); 10.1063/1.4812266High-peak-power surface high-harmonic generation at extreme ultra-violet wavelengths from a tape Journal of Applied Physics 114, 043106 (2013) Abstract. High-harmonic generation (HHG) from replenishing tape surfaces allows for multi-Hz applications. Unlike conventional gas-based HHG, solid-surface HHG (SHHG) uses peak laser intensities upwards of 10 18 -10 19 W/cm 2 . This allows a fs-class 100 mJ pulse to be focused down tighter, enabling a more compact harmonic generating setup. Operating in the sub-relativistic Coherent Wake Emission (CWE) regime, we have experimentally investigated MW-level XUV-domain photons produced from different tape materials. The tapes are thin and can be used as beam combining optics for LPA electron beams and HHG seed radiation.