| Upon intense excitation with ultrashort laser pulses materials are driven into highly non-equilibrium states and can undergo structural changes on very rapid time-scales, often along unusual, non-equilibrium pathways. Due to the unique combination of atomic-scale spatial and temporal resolution, the recent progress in the development of ultrafast short wavelength sources has provided new opportunities for studying such processes. This talk will discuss some examples of our work on ultrafast diffraction with laser-driven as well as accelerator-based femtosecond XUV- and X-ray sources. |
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