Research

We study intense laser-matter interactions through computational approaches.

I. Relativistic laser-plasma interactions

Key words: ultraintense laser; relativistic plasma; radiation sources; particle-in-cell simulations.

An interdisciplinary field involving relativistic nonlinear optics and plasma physics.

Focus on laser-plasma based novel radiation sources, i.e., extreme photonics, including high harmonic generation (HHG) / attosecond pulse(s), brilliant x-ray & γ-ray, high-field terahertz (THz), EMP, etc.

With interest in other related topics: laser plasma accelerators (electrons, ions, positrons, neutrons..), laboratory astrophysics, ultrafast and high-field phenomena, high energy density physics.

荣获2018年诺贝尔物理学奖的啁啾脉冲放大（CPA）技术，使得超短超强激光能在实验室创造出前所未有的超高能量密度、超强电磁场和超快时间尺度等综合极端物理条件。当前最前沿的激光功率可达10拍瓦（1拍瓦=1015瓦）量级，经聚焦后在单位时间、单位空间内的能量密度可达1023瓦/平方厘米以上，不仅妥妥的地表最强，甚至还超过了宇宙中伽马射线暴的强度。在如此极端光场下，光与物质（几乎所有的物质都已被电离成等离子体）相互作用蕴含大量丰富有趣的物理，还可能带来许多实际应用，比如带电粒子可以在很短距离内被加速到很高能量，能以不同机制辐射出超短超亮电磁波，还能产生显著的辐射阻尼、正负电子对产生和湮灭等量子电动力学效应。超短超强激光的飞速发展开辟了激光聚变、激光加速、新型辐射源、核物理与核医学、实验室天体物理等新兴前沿领域，并且还在不断地往（功率）更高、（脉宽）更快、（光强）更强推进。我们的研究工作包括但不限于基于相对论强度激光（功率密度大于1018瓦/平方厘米）与等离子体相互作用的新型辐射光源的产生和应用，涉及高次谐波和阿秒脉冲（高亮度相干极紫外/软X射线阿秒光源）、高亮度X射线和γ光源、强场太赫兹辐射、射频微波电磁脉冲等。

招生信息：本研究方向招收硕、博士研究生。招生专业：等离子体物理。研究方向：激光等离子体物理。

We are always looking for motivated undergraduates, graduate students, and postdoctoral scholars to join our team!

Relevant publications:

II. Strong-field laser-solids interactions

Using first-principles simulations based on the framework of real-time time-dependent density-functional theory (TDDFT), we study:

  • Non-perturbative high harmonic generation in the condensed phase;
  • Ultrafast dynamics and nonlinear behavior of carriers under strong-field excitation in novel material systems.

These studies are relevant to applications such as novel compact short-wavelength light sources, attosecond photonics, nanophotonics, strong-feild optoelectronics, petahertz electronics, spectroscopy with attosecond-nanometer resolution, etc.

Relevant publications: