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Nonequilibrium band occupation and optical response of gold after ultrafast XUV excitation
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Ndione, Pascal D., Weber, Sebastian T., Gericke, Dirk O. and Rethfeld, Baerbel (2022) Nonequilibrium band occupation and optical response of gold after ultrafast XUV excitation. Scientific Reports, 12 (1). 4693. doi:10.1038/s41598-022-08338-2 ISSN 2045-2322.
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Official URL: https://doi.org/10.1038/s41598-022-08338-2
Abstract
Free electron lasers offer unique properties to study matter in states far from equilibrium as they combine short pulses with a large range of photon energies. In particular, the possibility to excite core states drives new relaxation pathways that, in turn, also change the properties of the optically and chemically active electrons. Here, we present a theoretical model for the dynamics of the nonequilibrium occupation of the different energy bands in solid gold driven by exciting deep core states. The resulting optical response is in excellent agreement with recent measurements and, combined with our model, provides a quantitative benchmark for the description of electron–phonon coupling in strongly driven gold. Focusing on sub-picosecond time scales, we find essential differences between the dynamics induced by XUV and visible light.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Journal or Publication Title: | Scientific Reports | ||||||
| Publisher: | Nature Publishing Group UK | ||||||
| ISSN: | 2045-2322 | ||||||
| Official Date: | 18 March 2022 | ||||||
| Dates: |
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| Volume: | 12 | ||||||
| Number: | 1 | ||||||
| Article Number: | 4693 | ||||||
| DOI: | 10.1038/s41598-022-08338-2 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Date of first compliant deposit: | 18 November 2022 | ||||||
| Date of first compliant Open Access: | 18 November 2022 | ||||||
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