Abstract

By applying the time-dependent density-functional theory, we theoretically investigate the multielectron effect in the extreme UV (XUV) light-driven ionization of atoms and diatomic molecules beyond the dipole approximation. Compared to the theoretical results obtained in the single active electron approximation, the multielectron effect leads to more tilted photoelectron angular momentum distributions (PADs) toward the light propagation direction. According to our analysis, this might be due to photon momentum sharing between multiple electrons. Furthermore, we study the multielectron effect on the birth time delay phenomenon in the ionization of a hydrogen molecule. By extracting the interference minima of the PADs, we demonstrate that the birth time delay is hardly affected by the multielectron effect. The present work provides a better understanding of the association between the nondipole effect and the multielectron effect.

© 2022 Optica Publishing Group

Nondipole effects on the double-slit interference in molecular ionization by xuv pulses

Kunlong Liu, Yibo Hu, Qingbin Zhang, and Peixiang Lu
Opt. Express 29(23) 38758-38767 (2021)

Nondipole effects in terahetz-pulse-assisted strong-field ionization

Dejan B. Milošević and Dino Habibović
Opt. Express 30(17) 29979-29990 (2022)

Exchange effects in strong-field ionization of the excited lithium ion induced by one- and two-component laser fields

D. Habibović and D. B. Milošević
J. Opt. Soc. Am. B 40(8) 2201-2210 (2023)

Molecular strong-field approximation for photodetachment of electrons from homonuclear diatomic molecular anions

A. Gazibegović-Busuladžić, D. Habibović, M. Busuladžić, and D. B. Milošević
J. Opt. Soc. Am. B 37(3) 813-819 (2020)

Laser-induced deformation of atomic p_± orbitals in orthogonally polarized two-color laser fields

Kun Liu, Min Li, Wenhai Xie, Yanan Qin, Keyu Guo, Jiaqing Yan, Kunlong Liu, Yueming Zhou, and Peixiang Lu
J. Opt. Soc. Am. B 39(6) 1557-1564 (2022)