Details
| Original language | English |
|---|---|
| Article number | 023117 |
| Journal | Physical Review A |
| Volume | 106 |
| Issue number | 2 |
| Publication status | Published - 26 Aug 2022 |
Abstract
Measuring the ionization and recombination times in high-order harmonic generation driven by strong laser fields is of fundamental importance in attosecond science and vital for assessing the temporal accuracy of trajectory-resolved high-harmonic spectroscopy. We investigate the effect of the electron-core interaction on the ionization and recombination times of the long trajectory in high-order harmonic generation. Using a classical model and the analytical R-matrix theory for helium, it is found that the attractive interaction leads to a 30-as shift of the ionization times for the long trajectory. By numerically solving the time-dependent Schrödinger equation for a helium atom model, we demonstrate that this small time shift can be probed by using orthogonally polarized two-color fields with high probe frequencies.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 106, No. 2, 023117, 26.08.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ionization and recombination times of the long trajectory in high-order harmonic generation
AU - Yue, Shengjun
AU - Li, Yangyang
AU - Xue, Shan
AU - Du, Hongchuan
AU - Lein, Manfred
N1 - Funding Information: We thank X. Zhu for valuable discussions. This work was supported by the National Natural Science Foundation of China (Grants No. 11874030, No. 11904146, and No. 12064023), the Natural Science Foundation of Gansu Province (Grant No. 20JR5RA209), and the Scientific Research Program of the Higher Education Institutions of Gansu Province of China (Grant No. 2020A-125).
PY - 2022/8/26
Y1 - 2022/8/26
N2 - Measuring the ionization and recombination times in high-order harmonic generation driven by strong laser fields is of fundamental importance in attosecond science and vital for assessing the temporal accuracy of trajectory-resolved high-harmonic spectroscopy. We investigate the effect of the electron-core interaction on the ionization and recombination times of the long trajectory in high-order harmonic generation. Using a classical model and the analytical R-matrix theory for helium, it is found that the attractive interaction leads to a 30-as shift of the ionization times for the long trajectory. By numerically solving the time-dependent Schrödinger equation for a helium atom model, we demonstrate that this small time shift can be probed by using orthogonally polarized two-color fields with high probe frequencies.
AB - Measuring the ionization and recombination times in high-order harmonic generation driven by strong laser fields is of fundamental importance in attosecond science and vital for assessing the temporal accuracy of trajectory-resolved high-harmonic spectroscopy. We investigate the effect of the electron-core interaction on the ionization and recombination times of the long trajectory in high-order harmonic generation. Using a classical model and the analytical R-matrix theory for helium, it is found that the attractive interaction leads to a 30-as shift of the ionization times for the long trajectory. By numerically solving the time-dependent Schrödinger equation for a helium atom model, we demonstrate that this small time shift can be probed by using orthogonally polarized two-color fields with high probe frequencies.
UR - http://www.scopus.com/inward/record.url?scp=85137169373&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.106.023117
DO - 10.1103/PhysRevA.106.023117
M3 - Article
AN - SCOPUS:85137169373
VL - 106
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 2
M1 - 023117
ER -