Open AccessResonance-like enhancement in high-order above threshold ionization of atoms and molecules in intense laser fields
Author(s) -
Bobin Li,
Shiqiang Hu,
Zheng Shu,
X. T. He,
Jing Chen
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.013012
Subject(s) - ionization , atomic physics , excited state , resonance (particle physics) , excitation , laser , physics , molecule , spectral line , optics , ion , quantum mechanics
We investigate the high-order above-threshold ionization (HATI) of atoms (Ar and Xe) and molecules (N 2 and O 2 ) subjected to strong laser fields by numerically solving time-dependent Schrödinger equation. It is demonstrated that resonance-like enhancement of groups of adjacent peaks in photoelectron spectrum of HATI is observed for Ar, Xe, and N 2 , while this peculiar phenomenon is absent for O 2 , which is in agreement with experimental observation [ Phys. Rev. A88, 021401 (2013)]. In addition, analysis indicates that resonance-like enhancement in HATI spectra of atoms and molecules is closely related to excitation of the high-lying excited states.