A5101863936- Laser-Matter Interactions and Applications
- Laser-Plasma Interactions and Diagnostics
- Advanced Fiber Laser Technologies
- Laser-induced spectroscopy and plasma
- Fluid Dynamics and Turbulent Flows
- Particle Dynamics in Fluid Flows
- High-pressure geophysics and materials
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Computational Fluid Dynamics and Aerodynamics
- Advanced Chemical Physics Studies
- Laser Design and Applications
- Solid State Laser Technologies
- Terahertz technology and applications
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Laser Material Processing Techniques
- Nonlinear Optical Materials Studies
- Ion-surface interactions and analysis
- Wireless Communication Networks Research
- Quantum optics and atomic interactions
- Spectroscopy Techniques in Biomedical and Chemical Research
- Solar and Space Plasma Dynamics
- Advanced MIMO Systems Optimization
- Quantum, superfluid, helium dynamics
Chinese Academy of Sciences
2011-2025
Institute of Physics
2011-2025
Institute of Applied Physics and Computational Mathematics
2012-2024
Dalian Institute of Chemical Physics
2024
University of Chinese Academy of Sciences
2024
University of Central Florida
2020-2023
Peking University
2014-2023
State Key Laboratory of Nuclear Physics and Technology
2023
Singapore Institute of Manufacturing Technology
2018-2020
Chinese PLA General Hospital
2016
The advent of chirped-pulse amplification in the 1980s and femtosecond Ti:sapphire lasers 1990s enabled transformative advances intense laser–matter interaction physics. Whereas most experiments have been conducted limited near-infrared range 0.8–1 μm, theories predict that many physical phenomena such as high harmonic generation gases favor long laser wavelengths terms extending high-energy cutoff. Significant progress has made developing few-cycle, carrier-envelope phase-stabilized,...
We report the first experimental observation on reduction of backward scatterings by an instantaneous broadband laser with 0.6% bandwidth in conditions interest for inertial confinement fusion at low-coherence Kunwu facility. The backscatter stimulated Brillouin scattering (SBS) was robustly reduced half intensities $1--5\ifmmode\times\else\texttimes\fi{}{10}^{14}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$ $0.53\text{\ensuremath{-}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ comparison...
We report a multimicrojoule, ultrabroadband midinfrared optical parametric amplifier based on GaSe nonlinear crystal pumped at ∼2 μm. The generated idler pulse has flat spectrum spanning from 4.5 to 13.3 μm −3 dB and 4.2 16 in the full spectral range, with central wavelength of 8.8 proposed scheme supports subcycle Fourier-transform-limited width. A (2+1)-dimensional numerical simulation is employed reproduce obtained spectrum. To our best knowledge, this broadest ever by amplifiers region....
Isolated attosecond extreme-ultraviolate (XUV) pulses are generated based on high-harmonic-generation from a neon gas cell driven by carrier-envelope phase stabilized sub-5-fs Ti:sapphire laser at repetition rate of 1 kHz. Temporal characterization isolated XUV is demonstrated to be 160-attosecond streaking spectroscopy. The development source and spectroscopy will allow scientists explore the electron dynamics in matter.
Tritium-hydrogen-deuterium (THD) target is adopted in order to experimentally diagnose the properties of ignition hot spot and highly compressed main fusion fuel (Edwards M. J. et al., Phys. Plasmas, 18 (2011) 051003). As compared with deuterium-tritium (DT) target, thermonuclear alpha particles which are needed heat fuel, much less THD target. In present paper, effect particle heating on deceleration phase Rayleigh-Taylor instability (dp-RTI), one key problems formation, investigated...
We use a carrier-envelope-phase stabilized sub-2-cycle laser pulse to generate high-order harmonics and study how the two-dimensional spectrum of harmonics, with resolutions in temporal frequency spatial frequency, is shaped by phase. An arrowlike obtained experimentally when gas cell located front focus point shows resolution full quantum trajectories; i.e., from different trajectories stand on positions this spectrum. In particular, due phase combined classical-like action, short long...
Abstract In laser-driven inertial confinement fusion, driving pressure boosting and smoothing are major challenges. A proposed hybrid-drive (HD) scheme can offer such ideal HD performing stable implosion nonstagnation ignition. Here we report that in the hemispherical planar ablator targets installed semicylindrical hohlraum scaled down from spherical of designed ignition target, under indirect-drive (ID) laser energies ~43–50 kJ, peak radiation temperature 200 ± 6 eV is achieved. And using...
We report the formation of jet-like long spike in nonlinear evolution ablative Rayleigh-Taylor instability (ARTI) experiments by numerical simulations. A preheating model κ(T) = κSH[1 + f(T)], where κSH is Spitzer-Härm (SH) electron conductivity and f(T) interprets tongue effect cold plasma ahead front [Phys. Rev. E 65 (2002) 57401], introduced The simulation results ARTI are general agreement with experiment results. It found that two factors, i.e., suppressing Kelvin-Helmholtz (AKHI) heat...
A weakly nonlinear model is established for incompressible Rayleigh–Taylor instability with surface tension. The temporal evolution of a perturbed interface explored analytically via the third-order solution. dependence first three harmonics on tension discussed. amplitudes bubble and spike are greatly affected by saturation amplitude fundamental mode versus Atwood number investigated into consideration. decreases increasing A. Surface exhibits stabilizing phenomenon. It shown that...
We generalize the Layzer's bubble model to cases of two-dimensional and three-dimensional analytical models an arbitrary interface Atwood number obtain self-consistent equations. The generalized provides a continuous evolution from earlier exponential growth nonlinear regime. asymptotic velocities are obtained for Rayleigh-Taylor(RT) Richtmyer-Meshkov(RM) instabilities. also report on expressions RT velocity.
We have experimentally investigated high-order-harmonic generation driven by a few-cycle truncated Bessel (TB) laser beam which propagates through optical elements of finite aperture sizes. The TB was first Nisoli et al. [Phys. Rev. Lett. 88, 033902 (2002)], who assumed an infinite size for the so they concluded that phase and intensity field oscillate dramatically around focus in space. However, all real experiments, are always would further truncate beam, oscillations dwindle...
In this paper, we experimentally investigate a high-order harmonic generation (HHG) process in gas mixture of Ar and Kr. Compared with HHG pure medium, strong modification the spectrum is observed when second injected. The final overall determined by initial pressure individual before mixing. Further analysis simulation show that possibly contributed two processes. First, broadband phase-matching condition among same type atoms shifted increasing or decreasing ionization ratio Kr from...
Abstract We discuss the formation of a Kelvin–Helmholtz instability (KHI) produced by laser-driven thin separate plastic (CH) foil plasma. The experimental design consists magnetized plasma driven intense laser irradiation and small cylindrical permanent magnet. By comparing situations with without an external magnetic field, we found that KHI showed different rolling features which could be effectively suppressed field. A quantitative analysis shows consistency between experiments theory.
High order harmonics generation from argon gas was comprehensively investigated by using multi-cycle and few-cycle laser pulses. Non-odd were observed for sub-5-fs pulses, compare to the normal odd-order in case. Theoretic analysis shows that new spectral structure origins asymmetry of field This induced both amplitude phase difference between attosecond pulses consecutive half-cycle field, which change interference property result complex spectrum.
In cognitive radio, the spectrum decision is crucial to radio users, because it determines communication channel and transmission power. Traditionally, doesn't consider correctness of information, leading lowly effective utilization. So in this paper, we combine sensing prediction enhance utilization reduce interference on primary user. addition, propose an solution using dual optimal theory. simulation, discuss performance proposed method.
In a reference system moving with the bubble vertex we investigate effects of fluid viscosity and surface tension on velocity in nonlinear Rayleigh-Taylor (RT) Richtmyer-Meshkov (RM) instabilities, by extending ideal model [Goncharov V N, Phys. Rev. Lett. 88 134502 (2002)] to non-ideal case. First all, governing equation (i.e. self-consistent differential equations) describing dynamic front RT RM instabilities is obtained. Then, numerical asymptotic solutions two-dimensional planar geometry...
Taking the long-wavelength Rayleigh–Taylor instability (RTI) on thin shell of inertial confinement fusion as research object, a linear analytical model is presented to study phase effects that are caused by difference single-mode perturbations two interfaces. Its accuracy tested numerical simulations. By analyzing characteristic this model, it found does not change basic RTI structure (only one spike and bubble in period). However, symmetry destroyed, which has non-expected influences...
Hollow core waveguides are widely used in extreme field research to guide laser pulses. The peak intensity is usually several orders higher than the damage threshold of waveguide cladding material these applications. nonlinear drift spatial focus such high power with or fluctuation can easily destroy an avalanche manner. In this letter, we experimentally investigate focal position and size a sub-terawatt beam respect pulse energy duration. A theoretical model derived qualitatively explains...
Effects of a continuous magnetic field in the direction streaming on incompressible Kelvin—Helmholtz instability (KHI) are investigated by solving linear ideal magnetohydrodynamic equations. It is found that frequency KHI not influenced field. The strength effect decreases growth KHI, while gradient scale length increases its growth. can even be completely suppressed when strong enough. rate approaches maximum large
Generation of the second harmonic initiated by Bell—Plesset effects in a cylindrical geometry is studied analytically. For an initial single-mode velocity perturbation, second-order mode-coupling formula obtained expanding perturbation displacement and potential up to accuracy. It found that initially symmetric interface evolves into significant bubble-spike asymmetric pattern. The solutions clearly show amplitude spike grows faster than bubble. temporal evolutions amplitudes bubble are...
Pillars of Creation, one the most recognized objects in sky, are believed to be associated with formation young stars. However, so far, and maintenance mechanism for pillars still not fully understood due complexity nonlinear radiation magneto-hydrodynamics (RMHD). Here, assuming laboratory laser-driven conditions, we studied self-consistent dynamics pillar structures magnetic fields by means two-dimensional (2D) three-dimensional (3D) RMHD simulations, these results also support our...
The linear growth of Rayleigh–Taylor instability (RTI) two superimposed finite-thickness fluids in a gravitational field is investigated analytically. Coupling evolution equations for perturbation on the upper, middle and lower interfaces stratified are derived. rate RTI amplitudes three obtained by solving coupling equations. It found that reduce interface. However, effect plays an important role even thin layers which will cause more severe growth. Finally, dependence interface position...