Optimization of the femtosecond laser impulse for excitation and the Spin-Orbit me diate d dissociation in the NaRb Dimer

We study the dynamics of multiple coupled states under the influence of an arbitrary time-dependent external field to investigate the femtosecond laser-driven excitation and the spin-orbit mediated disso-ciation in the NaRb dimer. In this process, the dimer is excited from the ground triplet state 1 3 E+ to the 1 3 11 state using the femtosecond laser impulse and the spin-orbit coupling between the 1 3 11 and 2 1 E+ states results in the singlet-triplet transition. The laser impulse parameters are optimised to obtain maximum yield in electronic states correlating with the first excited atomic asymptote. We observe the detailed population statistics and power-law decay of these states. Finally, the analysis of the popula-tion oscillations allows us to determine the optimal time delay for dumping the molecule to its absolute ground state. (c) 2023 Elsevier Ltd. All rights reserved.

Automated summary

We investigate the dynamics of multiple coupled states in the NaRb dimer under the influence of an arbitrary time-dependent external field, examining the femtosecond laser-driven excitation and spin-orbit mediated dissociation. The dimer is excited from the ground triplet state to the 1 3 11 state using a femtosecond laser impulse, and the singlet-triplet transition is facilitated by the spin-orbit coupling between the 1 3 11 and 2 1 E+ states. Optimized laser impulse parameters are used to obtain maximum yield in electronic states correlating to the first excited atomic asymptote. Detailed population statistics and power-law decay of these states are observed. The analysis of population oscillations enables determination of the optimal time delay for dumping the molecule to its absolute ground state.