High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser

Yu He; Inna Vishik; Ming Yi; Shuolong Yang; Zhongkai Liu; James Lee; Sudi Chen; Slavko Rebec; Dominik Leuenberger; Alfred Zong; Michael Jefferson; Robert Moore; Patrick Kirchmann; Andrew Merriam; Zhixun Shen

doi:10.1063/1.4939759

arXiv · 1509.01311

High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser

Yu He·Inna Vishik·Ming Yi·Shuolong Yang·Zhongkai Liu·James Lee·Sudi Chen·Slavko Rebec·Dominik Leuenberger·Alfred Zong·Michael Jefferson·Robert Moore·Patrick Kirchmann·Andrew Merriam·Zhixun Shen

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Abstract

We developed a table-top vacuum ultraviolet (VUV) laser with $113.778$nm 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$\times$10$^{12}$ 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.

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Yu He, Inna Vishik, Ming Yi, Shuolong Yang, Zhongkai Liu, James Lee, Sudi Chen, Slavko Rebec, Dominik Leuenberger, Alfred Zong, Michael Jefferson, Robert Moore, Patrick Kirchmann, Andrew Merriam, Zhixun Shen. 2015-09-04. High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser. https://doi.org/10.1063/1.4939759

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