Zhi-Hui Lyu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Zhi-Hui Lyu has a total of 22 co-authors. Here are the top co-authors by number of shared publications:
- Zengxiu Zhao
National University of Defense Technology
2 shared publications Cong-Sen Meng
Hunan Key Laboratory of Extreme Matter and Applications, National University of Defense Technology, Changsha 410073, China
1 shared publication- Cong-Sen Meng
Department of Physics, National University of Defense Technology, Changsha 410073, China
1 shared publication Congsen Meng
Department of Physics, National University of Defense Technology, Changsha 410073, China
1 shared publicationDong-Wen Zhang
Hunan Key Laboratory of Extreme Matter and Applications, National University of Defense Technology, Changsha 410073, China
1 shared publicationDongwen Zhang
Department of Physics, National University of Defense Technology, Changsha 410073, China
1 shared publication
Latest Publications
- 1 November 2025
- Published by IOP Publishing in Chinese Physics Letters
- Vol. 42 (12)
In Situ Attosecond Probing of Strong-Field Ionization Dynamics via a Transient Plasma Grating
We demonstrate an all-optical technique for in situ monitoring of strong-field ionization (SFI) dynamics. The method relies on coherent scattering of a probe pulse from a transient plasma grating (TPG) formed by two interfering femtosecond pulses in a gas target. The diffracted signal provides a real-time, relative measure of the ionization yield. We demonstrate the method’s sensitivity by resolving the attosecond-scale coherent control of the ionization rate. Unlike conventional diagnostics that directly measure charged particles, our ensemble-based optical method is non-invasive and particularly suited for non-vacuum environments. To demonstrate its utility, we apply the technique to investigate the relationship between ionization and terahertz (THz) generation in a two-color ( ω + 2 ω ) field. We measure a phase offset of (0.18±0.05) π between the maxima of the ionization yield and the THz emission. This result provides a quantitative benchmark for theoretical models and establishes the TPG technique as a practical tool for probing SFI dynamics in ensemble systems.
- 1 November 2025
- Published by IOP Publishing in Chinese Physics Letters
- Vol. 42 (12)
In Situ Attosecond Probing of Strong-Field Ionization Dynamics via a Transient Plasma Grating
We demonstrate an all-optical technique for in situ monitoring of strong-field ionization (SFI) dynamics. The method relies on coherent scattering of a probe pulse from a transient plasma grating (TPG) formed by two interfering femtosecond pulses in a gas target. The diffracted signal provides a real-time, relative measure of the ionization yield. We demonstrate the method’s sensitivity by resolving the attosecond-scale coherent control of the ionization rate. Unlike conventional diagnostics that directly measure charged particles, our ensemble-based optical method is non-invasive and particularly suited for non-vacuum environments. To demonstrate its utility, we apply the technique to investigate the relationship between ionization and terahertz (THz) generation in a two-color ( ω + 2 ω ) field. We measure a phase offset of (0.18±0.05) π between the maxima of the ionization yield and the THz emission. This result provides a quantitative benchmark for theoretical models and establishes the TPG technique as a practical tool for probing SFI dynamics in ensemble systems.
- Open Access
- 1 January 2023
- Published by Shanghai Institute of Optics and Fine Mechanics in Chinese Optics Letters
- Vol. 21 (5) , 050201
Phase dependence of third-order harmonic generation in gases induced by two-color laser field
We experimentally demonstrate third-harmonic generation (THG) in gases ionized by a femtosecond laser pulse superimposed on its second-harmonic (SH). The mechanism of THG has been investigated, and it demonstrates that a third-order nonlinear process dominates at low pump intensity. Asymmetric third-harmonic (TH) spectra are observed at different time delays in two color fields, which are attributed to the process of the four-wave mixing (FWM) of the broad spectrum of pump pulses. A joint measurement on the terahertz (THz) and the TH is performed. It reveals that the optimized phase for the THG jumps from 0 to as the pump intensity increases, which is different from the THz being a constant, and indicates that the THG arises from the nonlinearity of the third-order bound electrons to the tunnel-ionization current.- 1 January 2023
- Published by Shanghai Institute of Optics and Fine Mechanics in Chinese Optics Letters
- Vol. 21 (5) , 050201
Open AccessPhase dependence of third-order harmonic generation in gases induced by two-color laser field
We experimentally demonstrate third-harmonic generation (THG) in gases ionized by a femtosecond laser pulse superimposed on its second-harmonic (SH). The mechanism of THG has been investigated, and it demonstrates that a third-order nonlinear process dominates at low pump intensity. Asymmetric third-harmonic (TH) spectra are observed at different time delays in two color fields, which are attributed to the process of the four-wave mixing (FWM) of the broad spectrum of pump pulses. A joint measurement on the terahertz (THz) and the TH is performed. It reveals that the optimized phase for the THG jumps from 0 to as the pump intensity increases, which is different from the THz being a constant, and indicates that the THG arises from the nonlinearity of the third-order bound electrons to the tunnel-ionization current. - Open Access
Broadband Terahertz Detection by Laser Plasma with Balanced Optical Bias
Using a controlled optical bias and balanced geometry, we propose a new scheme for broadband terahertz detection by laser-gas interaction without high-voltage manipulation. Compared to the conventional optical bias scheme, the common noise is reduced and the dynamic range as well as the signal-to-noise ratio are doubled. It provides a simple alternative for coherent broadband terahertz detection. The influence of optical bias on terahertz waveform is also investigated, and the evolution of the terahertz-induced second harmonic with probe delay is further revealed. This new detection scheme for broadband terahertz will boost the application of terahertz time-domain spectroscopy for its miniaturization and integrability.
Open AccessBroadband Terahertz Detection by Laser Plasma with Balanced Optical Bias
Using a controlled optical bias and balanced geometry, we propose a new scheme for broadband terahertz detection by laser-gas interaction without high-voltage manipulation. Compared to the conventional optical bias scheme, the common noise is reduced and the dynamic range as well as the signal-to-noise ratio are doubled. It provides a simple alternative for coherent broadband terahertz detection. The influence of optical bias on terahertz waveform is also investigated, and the evolution of the terahertz-induced second harmonic with probe delay is further revealed. This new detection scheme for broadband terahertz will boost the application of terahertz time-domain spectroscopy for its miniaturization and integrability.