| AVS 61st International Symposium & Exhibition | |
| Novel Trends in Synchrotron and FEL-Based Analysis Focus Topic | Tuesday Sessions |
| Session SA-TuA |
| Session: | Free Electron Laser and Synchrotron Studies at the Molecule-Surface Interfaces |
| Presenter: | Wilfried Wurth, Universität Hamburg, Germany |
| Correspondent: | Click to Email |
New light sources based on linear accelerators such as the free-electron laser FLASH at DESY in Hamburg in the extreme ultraviolet, the Linac Coherent Light Source LCLS in Stanford as the world´s first x-ray laser or FERMI at ELETTRA in Trieste as the first fully externally seeded free-electron laser provide ultrashort, extremely powerful short wavelength pulses with unprecedented coherence properties.
With these new sources it is possible to extend the well-established x-ray spectroscopic techniques for the investigation of the static electronic structure of matter like e.g. photoelectron and x-ray emission spectroscopy to probing the evolution of the electronic structure after controlled excitation in the time domain. The talk will review recent time-resolved x-ray spectroscopy experiments illustrating the opportunities for the study of ultrafast dynamics at surfaces. I will mainly discuss results which have been obtained in the framework of a large international Surface Science Collaboration at LCLS including groups from the US (SLAC in Stanford), from Sweden (University Stockholm), from Denmark ( Danish Technical University), and from Germany (Fritz-Haber Institute and Helmholtz Center Berlin, and the Center for Free-Electron Laser Science (CFEL) at the University of Hamburg). These results show that with the new sources it is possible to characterize transient intermediates in surface reactions. Furthermore first steps towards monitoring surface reactions in real-time will be illustrated.
This work has been supported by German Ministry for Education and Science through the priority program FSP-301: “FLASH: Matter in the Light of Ultrashort, Extremely Intense X-ray Pulses”
References:
M. Dell’Angela et al., Real-Time Observation of Surface Bond Breaking with an X-ray Laser, Science 339, 1302 (2013)
M. Beye et al., Selective Ultrafast Probing of Transient Hot Chemisorbed and Precursor States of CO on Ru(0001), Phys. Rev. Lett. 110, 186101 (2013)
T. Katayama et al., Ultrafast soft X-ray emission spectroscopy of surface adsorbates using an X-ray free electron laser, Journal of Electron Spectroscopy and Related Phenomena 187, 9 (2013)