Ionization and recombination times of the long trajectory in high-order harmonic generation

被引：9

作者：

Yue, Shengjun ^{[1
,2
,3
]}

Li, Yangyang ^{[1
,2
]}

Xue, Shan ^{[1
,2
]}

Du, Hongchuan ^{[1
,2
]}

Lein, Manfred ^{[3
]}

机构：

[1] Lanzhou Univ, Frontiers Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[3] Leibniz Univ Hannover, Inst Theoret Phys, Appelstr 2, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW A | 2022年 / 106卷 / 02期

关键词：

MULTIELECTRON DYNAMICS; FIELD;

D O I：

10.1103/PhysRevA.106.023117

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 Schrodinger 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.

引用

页数：9

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