Abstract
The role of the rotational coherence in the air lasing at 391 nm, corresponding to the coherent \(\mathrm{B}{}^2\Sigma _\mathrm{u}^+(v' = 0)-\mathrm{X}{}^2\Sigma _\mathrm{g}^+(v'' = 0)\) emission of N\(_2^+\) exposed suddenly to an ultrashort intense near-IR laser field, is investigated theoretically by referring to the recent experimental and theoretical studies on the air lasing that elucidated the mechanism of the population inversion between the \(\mathrm{B}{}^2\Sigma _\mathrm{u}^+\) and \(\mathrm{X}{}^2\Sigma _\mathrm{g}^+\) states in terms of the sudden turn-on of the interaction of N\(_2^+\) with the laser field combined with the post-ionization coupling among the \(\mathrm{X}{}^2\Sigma _\mathrm{g}^+\), \(\mathrm{A}{}^2\Pi _\mathrm{u}\), and \(\mathrm{B}{}^2\Sigma _\mathrm{u}^+\) states of N\(_2^+\).
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Acknowledgements
This research was supported by JSPS KAKENHI grants no. JP15K17805, no. JP24245003, no. JP15H05696, and no. 20H00371.
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Zhang, Y., Lötstedt, E., Yamanouchi, K. (2021). Theoretical Model for Simulation of Rotational Excitation in Air-Lasing. In: Yamanouchi, K., Manshina, A.A., Makarov, V.A. (eds) Progress in Photon Science. Springer Series in Chemical Physics, vol 125. Springer, Cham. https://doi.org/10.1007/978-3-030-77646-6_3
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