Bright High-Repetition-Rate XUV Source for Ultrafast ARPES
XUV source scheme with spectra & isolated 22 eV harmonic.
Demonstrated a highly-efficient XUV source for Time- & Angle-Resolved Photoemission Spectroscopy (trARPES) that delivers spectrally-isolated 22 eV pulses, uniquely combining 50-kHz repetition rate, narrow bandwidth, and high sample flux.
Significance and Impact
The XUV source enables studies of electronic dynamics in materials with high sensitivity, energy resolution & momentum-space access.
- A bright XUV flux is obtained in a cascaded scheme,with ultraviolet pulses focused tightly into Kr gas
- The conversion efficiency exceeds directly-driven harmonics more than 100-fold, boosted by dipole scaling & enhanced phase-matching
- A single 22 eV harmonic is directly isolated via metal foils, without needing a complex monochromator