Erik Lötstedt
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View article: Static-field ionization model of He-like ions for diagnostics of light-field intensity
Static-field ionization model of He-like ions for diagnostics of light-field intensity Open
We study static-field ionization of He-like ions with nuclear charge number\nin the range of $2\\le Z \\le 36$. Both the tunneling and over-the-barrier\nregimes are considered. We calculate the ionization rates by three approximate\nmethod…
View article: Generalized Phase Sensitivity of Directional Bond Breaking in the Laser-Molecule Interaction
Generalized Phase Sensitivity of Directional Bond Breaking in the Laser-Molecule Interaction Open
We establish a generalized picture of the phase sensitivity of laser-induced directional bond breaking using the H_{2} molecule as the example. We show that the well-known proton ejection anisotropy measured with few-cycle pulses as a func…
View article: Population inversion in laser-driven N<sub>2</sub><sup>+</sup>
Population inversion in laser-driven N<sub>2</sub><sup>+</sup> Open
The time-dependent population transfer process of N 2 + generated in an intense laser pulse has been investigated using the quasi-stationary Floquet theory by assuming that N 2 + experiences an intense laser pulse with the sudden turn-on. …
View article: Enhanced ionization of acetylene in intense laser pulses is due to energy upshift and field coupling of multiple orbitals
Enhanced ionization of acetylene in intense laser pulses is due to energy upshift and field coupling of multiple orbitals Open
Synopsis We describe a new enhanced ionization mechanism for polyatomic molecules. It works via a significant energy up-shift of valence orbitals for stretched bonds and a strong concomitant increase in the coupling between multiple molecu…
View article: Enhanced ionisation of polyatomic molecules in intense laser pulses is due to energy upshift and field coupling of multiple orbitals
Enhanced ionisation of polyatomic molecules in intense laser pulses is due to energy upshift and field coupling of multiple orbitals Open
We present the results of a combined experimental and numerical study on strong-field ionisation of acetylene performed with the aim of identifying the mechanism behind the previously reported surprisingly large multi-electron ionisation p…
View article: Fragmentation of long-lived hydrocarbons after strong field ionization
Fragmentation of long-lived hydrocarbons after strong field ionization Open
We experimentally and theoretically investigated the deprotonation process on\nnanosecond to microsecond timescale in ethylene and acetylene molecules,\nfollowing their double ionization by a strong femtosecond laser field. In our\nexperim…