Jia-Xiang Chen
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Jia-Xiang Chen has a total of 7 co-authors. Here are the top co-authors by number of shared publications:
- Xue-Bin Bian
Wuhan Institute of Physics and Mathematics
5 shared publications - Libin Fu
Graduate School of China Academy of Engineering Physics
2 shared publications - Qinzhi Xia
National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
2 shared publications Jia-Qi Liu
Wuhan Institute of Physics and Mathematics
1 shared publicationYi-Ben Wang
Wuhan Institute of Physics and Mathematics
1 shared publication- Zheng-Liang Li
Wuhan Institute of Physics and Mathematics
1 shared publication
Latest Publications
- 13 January 2026
- Published by American Physical Society (APS) in Physical Review A
- Vol. 113 (1)
Electron quiver amplitude in one-dimensional disordered systems
- 13 January 2026
- Published by American Physical Society (APS) in Physical Review A
- Vol. 113 (1)
Electron quiver amplitude in one-dimensional disordered systems
- 6 May 2025
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 134 (18) , 186901
Mass-Singularity-Induced Phase Jump in High-Harmonic Generation from Symmetry-Breaking Crystals
Symmetry plays a central role in fundamental physics. Here we identify a phase-jump phenomenon in high-order harmonic generation in symmetry-breaking crystals. This phenomenon originates from the singularity in the effective mass of electron-hole pairs at nonzero-distance collisions, a factor usually ignored in the literature. However, it determines the basic properties of harmonic emissions. This phase-jump phenomenon results in a suppression of the harmonic spectrum by orders, which is strongly orientation dependent. It is universal and not limited to a specific crystal. Clues to this can be found in published ab initio simulations and experimental results, but not interpreted. Our findings pave the way for a better understanding of the ultrafast dynamics of electron-hole pairs in XUV photon emission.
- 6 May 2025
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 134 (18) , 186901
Mass-Singularity-Induced Phase Jump in High-Harmonic Generation from Symmetry-Breaking Crystals
Symmetry plays a central role in fundamental physics. Here we identify a phase-jump phenomenon in high-order harmonic generation in symmetry-breaking crystals. This phenomenon originates from the singularity in the effective mass of electron-hole pairs at nonzero-distance collisions, a factor usually ignored in the literature. However, it determines the basic properties of harmonic emissions. This phase-jump phenomenon results in a suppression of the harmonic spectrum by orders, which is strongly orientation dependent. It is universal and not limited to a specific crystal. Clues to this can be found in published ab initio simulations and experimental results, but not interpreted. Our findings pave the way for a better understanding of the ultrafast dynamics of electron-hole pairs in XUV photon emission.
- 11 October 2024
- Published by American Physical Society (APS) in Physical Review A
- Vol. 110 (4)
Linking high-order harmonic generation and radial distribution function in liquids
- 11 October 2024
- Published by American Physical Society (APS) in Physical Review A
- Vol. 110 (4)
Linking high-order harmonic generation and radial distribution function in liquids
- 6 March 2024
- Published by American Physical Society (APS) in Physical Review A
- Vol. 109 (3) , 033104
Multiplateau structure caused by spectral interference in high-order harmonic generation from disordered Su-Schrieffer-Heeger chains
The multiple-plateau structure is a characteristic of high-order harmonic spectra in solids, resulting from strong interband couplings involving three or more bands. Here we show that high-order harmonic generation (HHG) in a two-band Su-Schrieffer-Heeger (SSH) system also exhibits a multiple-plateau structure under disorder effect. For weak external driving fields, the harmonic spectrum of disordered SSH chains exhibits an additional plateau and has a higher cutoff frequency compared with that of ordered SSH chains. The phase analysis of the harmonic spectra from various disordered SSH chains reveals that the second HHG plateau emerges from the interference between different regions. Through time-frequency analysis, we show that the harmonic phase corresponding to the caustic point is more localized than its neighboring orders.
- 6 March 2024
- Published by American Physical Society (APS) in Physical Review A
- Vol. 109 (3) , 033104
Multiplateau structure caused by spectral interference in high-order harmonic generation from disordered Su-Schrieffer-Heeger chains
The multiple-plateau structure is a characteristic of high-order harmonic spectra in solids, resulting from strong interband couplings involving three or more bands. Here we show that high-order harmonic generation (HHG) in a two-band Su-Schrieffer-Heeger (SSH) system also exhibits a multiple-plateau structure under disorder effect. For weak external driving fields, the harmonic spectrum of disordered SSH chains exhibits an additional plateau and has a higher cutoff frequency compared with that of ordered SSH chains. The phase analysis of the harmonic spectra from various disordered SSH chains reveals that the second HHG plateau emerges from the interference between different regions. Through time-frequency analysis, we show that the harmonic phase corresponding to the caustic point is more localized than its neighboring orders.
- 11 April 2023
- Published by American Physical Society (APS) in Physical Review A
- Vol. 107 (4) , 043111
Theoretical analysis of high-order harmonic generation in liquids by a semiclassical method
The study of high-order harmonic generation in liquid-state materials is still in its infancy. Quantitative models are highly required to understand the mechanisms. Here we develop a semiclassical method to investigate the ultrafast electron dynamics in liquids under monochromatic and two-color laser fields in momentum space. By assuming that different values are decoupled, we construct a quasienergy band for the liquid model and give the group velocity of the ionized electrons under the driving field. It successfully predicts the caustic enhancement of the liquid harmonic spectrum. We also find that the cutoff of the liquid harmonic spectrum is determined by the -dependent band gap. Our results provide a different perspective for analyzing the nonlinear and nonperturbative liquid-state harmonic generation.- 11 April 2023
- Published by American Physical Society (APS) in Physical Review A
- Vol. 107 (4) , 043111
Theoretical analysis of high-order harmonic generation in liquids by a semiclassical method
The study of high-order harmonic generation in liquid-state materials is still in its infancy. Quantitative models are highly required to understand the mechanisms. Here we develop a semiclassical method to investigate the ultrafast electron dynamics in liquids under monochromatic and two-color laser fields in momentum space. By assuming that different values are decoupled, we construct a quasienergy band for the liquid model and give the group velocity of the ionized electrons under the driving field. It successfully predicts the caustic enhancement of the liquid harmonic spectrum. We also find that the cutoff of the liquid harmonic spectrum is determined by the -dependent band gap. Our results provide a different perspective for analyzing the nonlinear and nonperturbative liquid-state harmonic generation.- 10 December 2021
- Published by American Physical Society (APS) in Physical Review A
- Vol. 104 (6) , 063109
Reconstruction of crystal band structure by spectral caustics in high-order harmonic generation
We propose a method to retrieve the band structure by measuring the caustic points of the harmonic spectrum generated by the interaction between laser and solid. The relation between the energy of the spectral caustic points and the external fields encodes the bandgap of the solid. Specifically, for a simple band structure, , according to the semiclassical theory, we map the crystal momentum to the caustic point energy by since is independent of the parameters and . Furthermore, for the general band structure, because its first-order form is a simple energy band, we can roughly retrieve the first-order form of the energy band and obtain the accurate band structure by iterative calculation. Using this method, we solve the deviation between the retrieved and the target bandgap near the Brillouin zone boundary. Also, we show that this method is suitable for wide-bandgap materials.- 10 December 2021
- Published by American Physical Society (APS) in Physical Review A
- Vol. 104 (6) , 063109
Reconstruction of crystal band structure by spectral caustics in high-order harmonic generation
We propose a method to retrieve the band structure by measuring the caustic points of the harmonic spectrum generated by the interaction between laser and solid. The relation between the energy of the spectral caustic points and the external fields encodes the bandgap of the solid. Specifically, for a simple band structure, , according to the semiclassical theory, we map the crystal momentum to the caustic point energy by since is independent of the parameters and . Furthermore, for the general band structure, because its first-order form is a simple energy band, we can roughly retrieve the first-order form of the energy band and obtain the accurate band structure by iterative calculation. Using this method, we solve the deviation between the retrieved and the target bandgap near the Brillouin zone boundary. Also, we show that this method is suitable for wide-bandgap materials.- 3 May 2021
- Published by Optica Publishing Group in Optics Letters
- Vol. 46 (10) , 2248-2251
Spectral caustics of high-order harmonics in one-dimensional periodic crystals
We theoretically investigate the spectral caustics of high-order harmonics in solids. We analyze the one-dimensional model of high-order harmonic generation (HHG) in solids and find that apart from the caustics originating from the van Hove singularities in the energy band structure, another kind of catastrophe enhancement also emerges in solids when the different branches of electron–hole trajectories generating high-order harmonics coalesce into a single branch. We solve the time-dependent Schrödinger equation in terms of the periodic potential and demonstrate the control of this kind of singularity in HHG with the aid of two-color laser fields. The diffraction patterns of the harmonic spectrum near the caustics agree well with the interband electron–hole recombination trajectories predicted by the semiconductor semiclassical equation. This work is expected to improve our understanding of the HHG dynamics in solids and enable us to manipulate the harmonic spectrum by adjusting the driving field parameters.
- 3 May 2021
- Published by Optica Publishing Group in Optics Letters
- Vol. 46 (10) , 2248-2251
Spectral caustics of high-order harmonics in one-dimensional periodic crystals
We theoretically investigate the spectral caustics of high-order harmonics in solids. We analyze the one-dimensional model of high-order harmonic generation (HHG) in solids and find that apart from the caustics originating from the van Hove singularities in the energy band structure, another kind of catastrophe enhancement also emerges in solids when the different branches of electron–hole trajectories generating high-order harmonics coalesce into a single branch. We solve the time-dependent Schrödinger equation in terms of the periodic potential and demonstrate the control of this kind of singularity in HHG with the aid of two-color laser fields. The diffraction patterns of the harmonic spectrum near the caustics agree well with the interband electron–hole recombination trajectories predicted by the semiconductor semiclassical equation. This work is expected to improve our understanding of the HHG dynamics in solids and enable us to manipulate the harmonic spectrum by adjusting the driving field parameters.