Oscillator-based High-order Harmonic Generation at 4MHz for Applications in Time-of-Flight Photoemission Spectroscopy

Abstract

We generate high-order harmonics at 4MHz by a long-cavity laser and demonstrate applications in time-of-flight photoemission spectroscopy. Our results suggest a straightforward, oscillator-only setup for HHG-based photoelectron spectroscopy and microscopy with high repetition rate.