High-Order Harmonic Source for Time- and Angle-Resolved Photoemission Spectroscopy Based on Nonlinear Compression of a Yb:KGW Laser

We have developed an experimental setup for ultrafast angle-resolved photoemission spectroscopy based on high-order harmonic generation from a Yb:KGW laser. Using nonlinear compression, we show that the time resolution can be improved to ∼30 fs.