Time-resolved HAXPES at SACLA: Probe and pump pulse-induced space-charge effects

L. P. Oloff, M. Oura, K. Rossnagel, A. Chainani, M. Matsunami, Ritsuko Eguchi, T. Kiss, Y. Nakatani, T. Yamaguchi, J. Miyawaki, M. Taguchi, K. Yamagami, T. Togashi, T. Katayama, K. Ogawa, M. Yabashi, T. Ishikawa

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Time-resolved hard x-ray photoelectron spectroscopy (trHAXPES) is established using the x-ray free-electron laser SACLA. The technique extends time-resolved photoemission into the hard x-ray regime and, as a core-level spectroscopy, combines element and atomic-site specificity and sensitivity to the chemical environment with femtosecond time resolution and bulk (sub-surface) sensitivity. The viability of trHAXPES using 8 keV x-ray free-electron-laser radiation is demonstrated by a systematic investigation of probe and pump pulse-induced vacuum space-charge effects on the V 1s emission of VO2 and the Ti 1s emission of SrTiO3. The time and excitation energy dependencies of the measured spectral shifts and broadenings are compared to the results of N-body numerical simulations and simple analytic (mean-field) models. Good agreement between the experimental and calculated results is obtained. In particular, the characteristic temporal evolution of the pump pulse-induced spectral shift is shown to provide an effective means to determine the temporal overlap of pump and probe pulses. trHAXPES opens a new avenue in the study of ultrafast atomic-site specific electron and chemical dynamics in materials and at buried interfaces.

Original languageEnglish
Article number123045
JournalNew Journal of Physics
Volume16
DOIs
Publication statusPublished - Dec 17 2014

Fingerprint

space charge
pumps
probes
pulses
x ray spectroscopy
x ray lasers
photoelectron spectroscopy
free electron lasers
sensitivity
shift
viability
photoelectric emission
laser beams
vacuum
spectroscopy
excitation
electrons
x rays
simulation
energy

Keywords

  • space-charge effects
  • time-resolved photoelectron spectroscopy
  • x-ray free-electron laser

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Oloff, L. P., Oura, M., Rossnagel, K., Chainani, A., Matsunami, M., Eguchi, R., ... Ishikawa, T. (2014). Time-resolved HAXPES at SACLA: Probe and pump pulse-induced space-charge effects. New Journal of Physics, 16, [123045]. https://doi.org/10.1088/1367-2630/16/12/123045

Time-resolved HAXPES at SACLA : Probe and pump pulse-induced space-charge effects. / Oloff, L. P.; Oura, M.; Rossnagel, K.; Chainani, A.; Matsunami, M.; Eguchi, Ritsuko; Kiss, T.; Nakatani, Y.; Yamaguchi, T.; Miyawaki, J.; Taguchi, M.; Yamagami, K.; Togashi, T.; Katayama, T.; Ogawa, K.; Yabashi, M.; Ishikawa, T.

In: New Journal of Physics, Vol. 16, 123045, 17.12.2014.

Research output: Contribution to journalArticle

Oloff, LP, Oura, M, Rossnagel, K, Chainani, A, Matsunami, M, Eguchi, R, Kiss, T, Nakatani, Y, Yamaguchi, T, Miyawaki, J, Taguchi, M, Yamagami, K, Togashi, T, Katayama, T, Ogawa, K, Yabashi, M & Ishikawa, T 2014, 'Time-resolved HAXPES at SACLA: Probe and pump pulse-induced space-charge effects', New Journal of Physics, vol. 16, 123045. https://doi.org/10.1088/1367-2630/16/12/123045
Oloff, L. P. ; Oura, M. ; Rossnagel, K. ; Chainani, A. ; Matsunami, M. ; Eguchi, Ritsuko ; Kiss, T. ; Nakatani, Y. ; Yamaguchi, T. ; Miyawaki, J. ; Taguchi, M. ; Yamagami, K. ; Togashi, T. ; Katayama, T. ; Ogawa, K. ; Yabashi, M. ; Ishikawa, T. / Time-resolved HAXPES at SACLA : Probe and pump pulse-induced space-charge effects. In: New Journal of Physics. 2014 ; Vol. 16.
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AU - Chainani, A.

AU - Matsunami, M.

AU - Eguchi, Ritsuko

AU - Kiss, T.

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