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Invited Article: High resolution angle resolved photoemission with tabletop 11 eV laser

  • Author(s): He, Y
  • Vishik, IM
  • Yi, M
  • Yang, S
  • Liu, Z
  • Lee, JJ
  • Chen, S
  • Rebec, SN
  • Leuenberger, D
  • Zong, A
  • Jefferson, CM
  • Moore, RG
  • Kirchmann, PS
  • Merriam, AJ
  • Shen, ZX
  • et al.

Published Web Location

https://doi.org/10.1063/1.4939759
Abstract

© 2016 AIP Publishing LLC. We developed a table-top vacuum ultraviolet (VUV) laser with 113.778 nm wavelength (10.897 eV) 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 10 MHz, provides a flux of 2 × 1012photons/s, and enables photoemission with energy and momentum resolutions better than 2 meV and 0.012 Å-1, respectively. Space-charge induced energy shifts and spectral broadenings can be reduced below 2 meV. The setup reaches electron momenta up to 1.2 Å-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.

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