Molecular reorientation in intense femtosecond laser fields
2002
A femtosecond double-pulse experiment shows that molecular reorientation during multiple ionization is a very fast process for light molecules such as O 2 or N 2 O using 60-fs laser pulses and variable time delays between ′ I ps in the 10 1 5 W/cm 2 intensity range. A unified two-dimensional model of molecular multiple ionization allows one to get the multicharged fragment trajectories and consequently discuss the speed of alignment of a molecule. The numerical results confirm that the molecular reorientation process is faster when the laser intensity increases, in good agreement with the experimental data.
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