Theoretical Simulation Of Molecular Alignment In Intense Laser Field

The manipulation of molecular alignment is very essential in chemical reactiondynamics, which could change directly the branch and efficiency of reaction. Byusing external field, such as static electronic or optical field, molecules will be excitedto rotational states, which will determine the molecular alignment. It is more wide andadjustable for molecular alignment by applying laser field than static electronic file.We introduce the alignment, which is included of adiabatic and non-adiabaticalignment, and calculate it with ultrafast and ultra-intense lase field in theory. Andalso we give theoretical formula to get molecular alignment.By applying Runge-Kutta method, we simulated the alignment of N2、O2、CO2and CS2、C2H2。The results show how to improve the alignment degree by changinglaser parameters or initial gas sample temperature. The improvement of alignment bemeaningful for other fields.