We developed a table-top vacuum ultraviolet (VUV) laser with 113.778nm wavelength (10.897eV) and demonstrated its viability as a photon source for high resolution angle-resolved photoemission spectroscopy (ARPES). This sub-nanosecond pulsed VUV laser operates at a repetition rate of 10MHz, provides a flux of 2×1012 photons/second, and enables photoemission with energy and momentum resolutions better than 2meV and 0.012\AA−1, respectively. Space-charge induced energy shifts and spectral broadenings can be reduced below 2meV. The setup reaches electron momenta up to 1.2\AA−1, granting full access to the first Brillouin zone of most materials. Control over the linear polarization, repetition rate, and photon flux of the VUV source facilitates ARPES investigations of a broad range of quantum materials, bridging the application gap between contemporary low energy laser-based ARPES and synchrotron-based ARPES. We describe the principles and operational characteristics of this source, and showcase its performance for rare earth metal tritellurides, high temperature cuprate superconductors and iron-based superconductors.
@article{arxiv.1509.01311,
title = {High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser},
author = {Yu He and Inna Vishik and Ming Yi and Shuolong Yang and Zhongkai Liu and James Lee and Sudi Chen and Slavko Rebec and Dominik Leuenberger and Alfred Zong and Michael Jefferson and Robert Moore and Patrick Kirchmann and Andrew Merriam and Zhixun Shen},
journal= {arXiv preprint arXiv:1509.01311},
year = {2016}
}