PhD subject : "Time-resolved studies of atoms, molecules and solids using intense ultrashort laser pulses in the extreme ultraviolet and X-ray spectral region as well as ultrashort, laser-generated, electron pulses." 

My project includes development, optimization and characterization of a laser-driven source for the generation of attosecond pulses, development and implementation of pump-probe measurement techniques and experiments at the high-order harmonic laboratory of the Lund High-Power Laser Facility and at international free electron laser facilities.

These experiments consist of shining a very powerful laser, from femtosecond -infrared (IR) laser- to attosecond -extreme ultraviolet (XUV) laser-like- pulse duration, on a target like a gases, liquids or solids. This allows the excitation of electronic states, where electrons absorb the ligth and for example can be emitted according to the energy of the incoming photons, and lead to ionization processes. This is done using free electron laser (FEL) facilities as well as high harmonic generation (HHG)

The laser facility in the intense beam line laboratory in the atomic physics division will be modified in order to achieve XUV-XUV pump-probe spectroscopy on molecules, instead of XUV-IR one. This will be done by implementing a new laser, generating more flux (intensity at the focus of the laser), and by separating the XUV beam in two. Faster behaviors can be probed using attosecond instead of femtosecond probe.

For instance, these pump-probe technics can provide charge migration within atoms or molecules but also charge transfer between molecules and these processes are probed in the same time. For this PhD project, the molecule chosen will depend on the properties we want to observe. For example, molecules in gas state will be studied but also one of the goal is to probe them in solvated solutions, that can show different behaviors.