Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize
Farewell: the NCCR MUST ended 
MUST2022 Conference
New scientific highlights
FELs of Europe prize for Jeremy Rouxel
Ruth Signorell wins Doron prize
New FAST-Fellow Uwe Thumm at ETH
International Day of Women and Girls in Science
New scientific highlight
EU XFEL Young Scientist Award for Camila Bacellar,
Prizes for Giulia Mancini and Rebeca Gomez Castillo
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List
Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” 
Unusual keynote talk at an international scientific conference
NCCR MUST at Scientifica 2021Diffractive imaging of ultrafast light-induced dynamics on the nanoscale
| Date | Do, 01.02.2018 | |
| Time | 14:00 | |
| Speaker | Dr. Daniela Rupp, MBI Berlin | |
| Location | ETHZ, Hönggerberg Campus, HPF G-6 | |
| Program | The excitation of nanoparticles, such as clusters and nanodroplets, with intense laser pulses provides a well-defined scenario to study the correlated dynamics of highly excited matter. Via diffractive imaging of single nanoparticles in free flight with XUV and X-ray free-electron lasers (FELs), we are able to explore the light-induced dynamics with high spatial and temporal resolution. From the measured diffraction patterns, formed by the interference of elastically scattered photons, the nanoparticle’s structure can be determined. This technique allows the study of non-depositable specimen, such as superfluid helium nanodroplets, and the observation of structural changes, e.g. ultrafast melting. Even faster electron dynamics also change the scattering response and can therefore in principle be mapped by diffractive imaging. By tuning the FEL wavelength to electronic resonances of the cluster material, we were able to trace characteristic features of the formation and evolution of a nanoplasma in the diffraction images, but the dynamics could not be temporally resolved with the 100 femtosecond FEL pulses. While sub-femtosecond pulses are under development at FELs, isolated attosecond XUV pulses and attosecond puls trains can already be achieved with high-harmonic-generation (HHG) sources based on intense femtosecond lasers, but they are typically orders of magnitude weaker than FELs. Very recently we demonstrated single-particle single-shot diffractive imaging of individual helium nanodroplets with a high-intensity HHG source (Rupp et al., Nature Communications 8, 493 (2017)). The results of our experiments, combined with the rapid development of today's XUV and X-ray lasers, provide a clear pathway to map excitation and charge separation processes in nanoscale matter on their natural time scale. |
|
| Link | Opteth | |
