Optimization of the Femtosecond Laser Impulse for Excitation and the Spin-Orbit Mediated Dissociation in the NaRb Dimer

Abstract

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 dissociation in the NaRb dimer. In this process, the dimer is excited from the ground triplet state $1^3{\Sigma }^{+}$ to the $1^3\Pi$ state using the femtosecond laser impulse and the spin-orbit coupling between the $1^3\Pi$ and $2^1{\Sigma }^{+}$ 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 population oscillations allows us to determine the optimal time delay for dumping the molecule to its absolute ground state.

7 pages, 4 figures, 1 table, submitted to Journal of Quantitative Spectroscopy and Radiative Transfer

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Cited by in corpus (1)

• Very accurate time propagation of coupled Schrödinger equations for femto- and attosecond physics and chemistry, with C++ source code