S. Eich (Author), A. Stange (Author), A. V. Carr (Author), Jurij Urbančič (Author), T. Popmintchev (Author), M. Wiesenmayer (Author), K. Jansen (Author), A. Ruffing (Author), S. Jakobs (Author), T. Rohwer (Author)

Abstract

Time- and angle-resolved photoemission spectroscopy (trARPES) using femtosecond extreme ultraviolet high harmonics has recently emerged as a powerful tool for investigating ultrafast quasiparticle dynamics in correlated-electron materials. However, the full potential of this approach has not yet been achieved because, to date, high harmonics generated by 800 nm wavelength Ti:Sapphire lasers required a trade-off between photon flux, energy and time resolution. Photoemission spectroscopy requires a quasi-monochromatic output, but dispersive optical elements that select a single harmonic can significantly reduce the photon flux and time resolution. Here we show that 400 nm driven high harmonic extreme-ultraviolet trARPES is superior to using 800 nm laser drivers since it eliminates the need for any spectral selection, thereby increasing photon flux and energy resolution to <150 meV while preserving excellent time resolution of about 30 fs.

Keywords

angle-resolved photoemission spectroscopy;ARPES;high harmonic generation;ultrafast surface science;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 54
COBISS: 4770299 Link will open in a new window
ISSN: 0368-2048
Views: 4470
Downloads: 0
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 231-236
Issue: ǂVol. ǂ195
Chronology: Aug. 2014
DOI: 10.1016/j.elspec.2014.04.013
ID: 9603397