CHIRPED PULSE CONTROL OF CSI FRAGMENTATION - AN EXPERIMENTAL POSSIBILITY

The strength of chirped pulse optimal control as an experimental possibility is demonstrated in this paper. The suggested experiment is a pump-dump experiment that first creates an unstable - dissociating - molecule on a repulsive level and then stops fragmentation. The experiment is envisioned by using a start pulse (a doubled green pulse) that inverts the population. The control pulse - that stops the fragmentation - is the chirp optimized green pulse itself. Optimization includes second and third order chirp expansion terms. Optimization is made for the weak and strong field limits with the help of the simulated annealing method. Weak field optimization shows the expected red chirp results. Strong field optimization, on the other hand, gives rise to blue chirp as optimal solution. It is argued, that the blue chirp is the consequence of the need for locking the upper and lower state wavefunctions for efficient population inversion.