Ionization dynamics of submicron-sized clusters in intense ultrafast laser pulses
Abstract
Submicron-sized targets are found in intense laser-cluster interaction experiments and laser-based material processing. Here we investigate the internal field localization due to Mie scattering and its effect on ionization dynamics in submicron-sized clusters using Mie calculation and particle-in-cell simulations. As a result of intertwined processes of pulse propagation and ionization, sub-micron nanofocusing dominates at lower intensity and gives rise to an ionization hotspot at the rear of the targets while plasma shielding wins over at a higher intensity, stopping further rear side ionization. As ionization is often the precursor of other processes, understanding the ionization dynamics of ultrafast laser pulses with wavelength-sized nanostructure can be relevant for intense laser-cluster experiments and femtosecond laser micro/nanomachining.
Keywords
Cite
@article{arxiv.2112.13655,
title = {Ionization dynamics of submicron-sized clusters in intense ultrafast laser pulses},
author = {Xiaohui Gao},
journal= {arXiv preprint arXiv:2112.13655},
year = {2023}
}