Femtosecond Soft-X-ray Absorption Spectroscopy of Liquids with a Water-Window High-Harmonic Source
| Autor: | Jean-Pierre Wolf, Kristina Zinchenko, Vít Svoboda, Cédric Schmidt, Adam D. Smith, Tadas Balciunas, Fernanda B. Nunes, Yi-Ping Chang, Zhong Yin, Emanuele Rossi, Hans Jakob Wörner |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Letter
Materials science Absorption spectroscopy High harmonics generation ddc:500.2 02 engineering and technology 01 natural sciences Molecular physics law.invention Soft X ray law Ionization 0103 physical sciences General Materials Science Physical and Theoretical Chemistry 010306 general physics Absorption (electromagnetic radiation) Water window X-ray absorption spectroscopy Transient absorption Ethanol Methanol Liquids 021001 nanoscience & nanotechnology Laser 3. Good health Temporal resolution Femtosecond 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry Letters, 11 (6) The Journal of Physical Chemistry Letters Journal of Physical Chemistry Letters, Vol. 11, No 6 (2020) pp. 1981-1988 |
| ISSN: | 1948-7185 |
| Popis: | Femtosecond X-ray absorption spectroscopy (XAS) is a powerful method to investigate the dynamical behavior of a system after photoabsorption in real time. So far, the application of this technique has remained limited to large-scale facilities, such as femtosliced synchrotrons and free-electron lasers (FEL). In this work, we demonstrate femtosecond time-resolved soft-X-ray absorption spectroscopy of liquid samples by combining a sub-micrometer-thin flat liquid jet with a high-harmonic tabletop source covering the entire water-window range (284–538 eV). Our work represents the first extension of tabletop XAS to the oxygen edge of a chemical sample in the liquid phase. In the time domain, our measurements resolve the gradual appearance of absorption features below the carbon K-edge of ethanol and methanol during strong-field ionization and trace the valence-shell ionization dynamics of the liquid alcohols with a temporal resolution of ∼30 fs. This technique opens unique opportunities to study molecular dynamics of chemical systems in the liquid phase with elemental, orbital, and site sensitivity. ISSN:1948-7185 |
| Databáze: | OpenAIRE |
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