Colloquium du CPHT


Le premier colloquium du CPHT de cette nouvelle série aura lieu mardi 19 novembre à 11h en salle des conférences Louis Michel

Mette Gaarde, Professeure à l'Université d'État de la Louisiane

"Making movies of ultrafast dynamics: tracking and controlling femtosecond absorption and emission processes"

Immense progress in the development of femtosecond and attosecond light sources means that scientists are now routinely directing movies of ultrafast electron and molecular dynamics as it is unfolding on its natural time scale. For example, intense femtosecond X-ray pulses from free-electron lasers can directly take pictures of molecular structural changes, and attosecond extreme ultraviolet (XUV) pulses have been used to time the photoelectric effect. I will start this talk with a brief overview of different types of dynamics that are of interest to the ultrafast community and how to probe them. Then I will discuss an example of opto-optical modulation: how to manipulate the femtosecond time-dependence of absorption and emission processes in gases, with an optical laser pulse, in order to control the temporal and spatial properties of an XUV pulse.