2 research outputs found
Experimental Demonstration of Attosecond Pump-Probe Spectroscopy with an X-ray Free-Electron Laser
Pump-probe experiments with sub-femtosecond resolution are the key to
understanding electronic dynamics in quantum systems. Here we demonstrate the
generation and control of sub-femtosecond pulse pairs from a two-colour X-ray
free-electron laser (XFEL). By measuring the delay between the two pulses with
an angular streaking diagnostic, we characterise the group velocity of the XFEL
and demonstrate control of the pulse delay down to 270 as. We demonstrate the
application of this technique to a pump-probe measurement in core-excited
para-aminophenol. These results demonstrate the ability to perform pump-probe
experiments with sub-femtosecond resolution and atomic site specificity.Comment: 55 pages, main manuscript (5 figures) + supplementary materials (25
figures), 30 figures total. Submitted to Nature Photonic
Recommended from our members
Experimental demonstration of attosecond pump–probe spectroscopy with an X-ray free-electron laser
Pump–probe experiments with subfemtosecond resolution are the key to understanding electronic dynamics in quantum systems. Here we demonstrate the generation and control of subfemtosecond pulse pairs from a two-colour X-ray free-electron laser. By measuring the delay between the two pulses with an angular streaking diagnostic, we characterize the group velocity of the X-ray free-electron laser and show control of the pulse delay down to 270 as. We confirm the application of this technique to a pump–probe measurement in core-ionized para-aminophenol. These results reveal the ability to perform pump–probe experiments with subfemtosecond resolution and atomic site specificity