A narrow bandwidth extreme ultra-violet light source for time- and angle-resolved photoemission spectroscopy
Abstract
Here we present a high repetition rate, narrow band-width, extreme ultraviolet (XUV) photon source for time- and angle-resolved photoemission spectroscopy (tr-ARPES). The narrow band width pulses meV for photon energies eV are generated through High Harmonic Generation (HHG) using ultra-violet (UV) drive pulses with relatively long pulse lengths (461 fs). The HHG setup employs an annuluar drive beam in a tight focusing geometry at a repetition rate of 250 kHz. Photon energy selection is provided by a series of selectable multilayer bandpass mirrors and thin film filters, thus avoiding any time broadening introduced by single grating monochromators. A two stage optical-parametric amplifier provides fs tunable pump pulses from 0.65 m to 9 m. The narrow bandwidth performance of the light source is demonstrated through ARPES measurements on a series of quantum materials including the high-temperature superconductor Bi-2212, WSe and graphene.
Keywords
Cite
@article{arxiv.2201.12456,
title = {A narrow bandwidth extreme ultra-violet light source for time- and angle-resolved photoemission spectroscopy},
author = {Qinda Guo and Maciej Dendzik and Antonija Grubišić-Čabo and Magnus H. Berntsen and Cong Li and Wanyu Chen and Bharti Matta and Ulrich Starke and Björn Hessmo and Jonas Weissenrieder and Oscar Tjernberg},
journal= {arXiv preprint arXiv:2201.12456},
year = {2022}
}