The effect of nuclear-quadrupole coupling in the laser induced alignment of molecules

Abstract

We present a theoretical study of the time-dependent laser alignment of molecules taking into account the hyperfine coupling due to nuclear-quadrupole interactions. The coupling of nuclear spins to the overall angular momentum of molecules significantly influences their rotational dynamics. Here, we systematically analyze the impact of the nuclear-quadrupole coupling on the rotational dynamics of the linear ${\text{I}}_2$ and the asymmetric-top diiodobenzene molecule induced by external laser fields. We explore different regimes of pulse shapes and laser-pulse intensities and detail under which conditions the quadrupole coupling cannot be neglected in the description of the laser alignment of molecules.

arXiv comment6 pages, 3 figures

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Cited by in corpus (4)

• Rotational coherence spectroscopy of molecules in helium nanodroplets: Reconciling the time and the frequency domains
• Femtosecond rotational dynamics of D${}_2$ molecules in superfluid helium nanodroplets
• Photo-ionization Initiated Differential Ultrafast Charge Migration: Impact of Molecular Symmetries and Tautomeric Forms
• Long-Lasting Orientation of Symmetric-top Molecules Excited by Two-Color Femtosecond Pulses