Steering population transfer of the Na₂molecule by an ultrashort pulse train

Abstract

We theoretically investigate the complete population transfer among quantum states of the Na 2 molecule using ultrashort pulse trains using the time-dependent wave packet method. The population accumulation of the target state can be steered by controlling the laser parameters, such as the variable pulse pairs, the different pulse widths, the time delays and the repetition period between two contiguous pulses; in particular, the pulse pairs and the pulse widths have a great effect on the population transfer. The calculations show that the ultrashort pulse train is a feasible solution, which can steer the population transfer from the initial state to the target state efficiently with lower peak intensities.

Selective excitation of vibrational states in three-state Na2 molecule by a chirped laser pulse

“…The population transfer and vibrational state population are illustrated by a model of the three-state Na 2 molecule. Figure 1 shows the three potential energy curves of the Na 2 molecule [24,25]. For simplicity, the electronic states 2 1 Π g are expressed as the 1, 2 and 3 states, respectively.…”