Full characterization and optimization of a femtosecond ultraviolet laser source for time and angle-resolved photoemission on solid surfaces

• DOI: 10.1063/1.3700190
• Publication Date: 2012-04-14T01:09:58Z
• Authors: J. Faure; J. Mauchain; E. Papalazarou; W. Yan; J. Pinon; M. Marsi; L. Perfetti
• Keywords: Brillouin zone; Extreme ultraviolet; Photon energy; Inverse photoemission spectroscopy

A novel experimental apparatus for time and angle-resolved photoemission on solid surfaces is presented. 6.28 eV laser source operating at 250 kHz repetition rate obtained by frequency mixing in nonlinear beta barium borate crystals. This UV light has a high photon flux of 1013 photons/s with relatively low number photons/pulse so that Fermi surface mapping over wide region the Brillouin zone possible while mitigating space charge effects. The been fully characterized spatially, spectrally, temporally. Its potential demonstrated through photoexcited electron dynamics Bismuth. True femtosecond resolution <65 fs energy 70 meV appears to be mainly limited bandwidth.