Spin-state photo-switching dynamics in molecular crystals investigated by time-resolved optical and x-ray techniques
Event details
| Date | 08.11.2012 |
| Hour | 13:30 › 14:30 |
| Speaker | Prof. Eric Collet, Institut de Physique de Rennes 1-CNRS |
| Location | |
| Category | Conferences - Seminars |
The current challenge in control science is not only to observe matter on ever smaller scale but also to direct its functionality at the relevant length, time and energy scales. It is the aim of light-driven transformations, to force the matter towards a new state far from thermal equilibrium. Photoinduced transition occurring in multi-stable materials involves different degrees of freedom at the molecular level as well as macroscopic propagating or diffusive effects (shockwave, thermal heating…), each of them being associated with a typical timescale. Understanding the physical mechanisms involved in the transformation induced by an ultra-short femtosecond laser pulse in solids is only emerging. Recent investigations performed by femtosecond optical spectroscopy, x-ray diffraction or XANES will be presented. In addition to the sub-picosecond molecular transformation, other slower effects of elastic or thermal nature should be considered for describing the macroscopic response, as different processes spanning from molecular to material scales are linked together.
Practical information
- General public
- Free
- This event is internal
Organizer
- Prof. Majed Chergui