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arXiv · 1303.3957

Optimal laser pulse design for transferring the coherent nuclear wave packet of H$_2^+$

Jun Zhang·Feng He
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Abstract

Within the Franck-Condon approximation, the single ionization of H$_2$ leaves H$_2^+$ in a coherent superposition of 19 nuclear vibrational states. We numerically design an optimal laser pulse train to transfer such a coherent nuclear wave packet to the ground vibrational state of H$_2^+$. The simulation results show that the population of the ground state after the transfer is more than 91%. Frequency analysis of the designed optimal pulse reveals that the transfer principle is mainly an anti-Stokes transition, i.e., the H$_2^+$ in $1sσ_g$ with excited nuclear vibrational states is first pumped to $2pσ_g$ state by the pulse at an appropriate time, and then dumped back to $1sσ_g$ with lower excited or ground vibrational states.

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Jun Zhang, Feng He. 2013-03-16. Optimal laser pulse design for transferring the coherent nuclear wave packet of H$_2^+$. https://doi.org/10.1080/00268976.2013.874601

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