High-order harmonic generation from periodic potentials with different initial states

Pan, Xue-Fei; Li, B.; Han, Tao; Zhang, J.; Liu, X. S.

doi:10.1209/0295-5075/128/54006

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…here, p presents the momentum operator, V (x) = −V 0 [1 + cos(2πx/a 0 )] is the Mathieu-type potential [33] which is a typical model potential and has been widely used in recent investigations of the solid HHG [34][35][36]. V 0 = 0.37 a.u.…”

Section: Theoretical Modelmentioning

confidence: 99%

Exploration of the high-order harmonic generation from periodic potentials by Bohmian trajectories

Pan

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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The recombination processes of the electrons in solid are illustrated by solving the time-dependent Schrödinger equation. The results show that the Bohmian trajectories and the time evolution of the electronic probability density agrees very well, which demonstrates that we can use the Bohmian trajectories to investigate the recombination processes of the electrons in solid. We select the region where the probability density of the electron reached the strongest and the weakest as the initial position of the calculated Bohmian trajectories, one can see that the Bohmian trajectories have similar structures. In addition, our results show that the emission time of the solid high-order harmonic generation (HHG) spectra from the time-frequency distribution agrees well with the time that the Bohmian trajectories change direction. By regulating the phase of the electric field, the electrons can move farther, which will result in the broad cutoff of the HHG. We have also demonstrated that the similar structure of the Bohmian trajectories of the solid with a defect for different initial positions disappears due to the broken periodic structure, which further illustrates that the motion processes of the electrons in solid depend on the structure of the solid.

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Section: Theoretical Modelmentioning

confidence: 99%

Exploration of the high-order harmonic generation from periodic potentials by Bohmian trajectories

Pan

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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“…The process of strong field ionization produces many highly nonlinear phenomena such as above-threshold ionization (ATI), high-order harmonic generation (HHG) and non-sequential double-ionization (NSDI) [3][4][5][6][7][8]. In recent decades, strong-field photoelectron holography interference [9], photoelectron momentum distributions (PMDs) [10] and angular distributions (PADs) [11] have (a) E-mail: junzhang@jlu.edu.cn (corresponding author) (b) E-mail: liuxs@jlu.edu.cn (corresponding author) attracted a lot of attention.…”

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confidence: 99%

Influence of Coulomb potential on photoelectron momentum distributions in few-cycle linearly polarized laser field

Sun

Chen

Wang

et al. 2022

EPL

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We investigate the influence of the Coulomb potential on the photoelectron momentum distributions of H atoms in few-cycle linearly polarized laser field by numerically solving the time-dependent Schrödinger equation and using the semi-classical method. We demonstrate that the electrons ionized from the different time windows will contribute to different interference types and regions in the photoelectron momentum distributions. The typical trajectories of the photoelectrons are used to illustrate the effect of the Coulomb potential on the interference stripes. We mainly investigate the photoelectron momentum distribution contributed by the electron wave packets, which are emitted within the nonadjacent falling edges of the electric field. In this case, a discontinuous region near the center of the photoelectron momentum distribution can be clearly observed, which exhibits a strong dependence on the Coulomb potential. We also observe a shift in the photoelectron momentum distributions in each quarter cycle. We quantitatively illustrate that the shift is induced by the Coulomb correction along the axis of polarization. Our results may provide a reference for further analytical research about the shift of the photoelectron momentum distributions in few-cycle strong laser field.

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Investigation of interference structure with different field intensication in linearly polarized laser field

Liu,

2024

Opt Rev

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High-order harmonic generation from periodic potentials with different initial states

Cited by 4 publications

References 26 publications

Exploration of the high-order harmonic generation from periodic potentials by Bohmian trajectories

Exploration of the high-order harmonic generation from periodic potentials by Bohmian trajectories

Influence of Coulomb potential on photoelectron momentum distributions in few-cycle linearly polarized laser field

Investigation of interference structure with different field intensication in linearly polarized laser field

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