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Title: Tunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy

We have developed an angle-resolved photoemission spectrometer with tunable vacuum ultraviolet laser as a photon source. The photon source is based on the fourth harmonic generation of a near IR beam from a Ti:sapphire laser pumped by a CW green laser and tunable between 5.3 eV and 7 eV. The most important part of the set-up is a compact, vacuum enclosed fourth harmonic generator based on potassium beryllium fluoroborate crystals, grown hydrothermally in the US. This source can deliver a photon flux of over 10{sup 14} photon/s. We demonstrate that this energy range is sufficient to measure the k{sub z} dispersion in an iron arsenic high temperature superconductor, which was previously only possible at synchrotron facilities.
Authors:
; ; ; ;  [1] ;  [2] ; ;  [3] ; ;  [4]
  1. Division of Materials Science and Engineering, Ames Laboratory, Ames, Iowa 50011 (United States)
  2. (United States)
  3. Department of Chemistry, Clemson University, Clemson, South Carolina 29634 (United States)
  4. Advanced Photonic Crystals LLC, Fort Mill, South Carolina 29708 (United States)
Publication Date:
OSTI Identifier:
22254996
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ARSENIC; BERYLLIUM; EV RANGE 01-10; FLUOROBORATES; HARMONIC GENERATION; HIGH-TC SUPERCONDUCTORS; IRON; LASERS; PHOTOEMISSION; PHOTONS; POTASSIUM; SAPPHIRE; SPECTROMETERS; SPECTROSCOPY; SYNCHROTRONS; ULTRAVIOLET RADIATION