Ultrafast transient optical and structural property modifications induced by ultrashort intense light pulses at XUV wavelengths

Intense fs-XUV laser-induced transient optical properties following free electron generation are investigated experimentally and theoretically. Electron-dynamics and resulting transient changes of the reflectivity and transmissivity and recently also the change of phase of an additional fs-probe pulse is considered. This completes the information of optical properties during the interaction process, which is of importance for basic research and diagnostic purposes.