体材料高次谐波产生的半经典模型的波传播计算方法
Computational Methods of Wave Propagation for Semiclassical Models of High Harmonic Generation in Bulk Solids
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中文总结 AI 辅助
该研究提出基于麦克斯韦方程和半导体布洛赫方程数值解的理论框架，用于自洽处理体半导体中超快强场下的高次谐波产生与传播，揭示了传播效应对谐波光谱的影响，为探索强场相互作用的不同区域提供了途径。
中文摘要 AI 辅助
我们提出了一个用于超快强场区域非线性光-物质相互作用自洽处理的理论框架，该框架基于麦克斯韦方程和半导体布洛赫方程的数值解。该框架被证明可描述体半导体中的高次谐波产生与传播，研究了传播效应导致的反射与透射谐波光谱的差异。我们表明，驱动激光脉冲与产生的谐波的组合场在体半导体中的传播会显著修改谐波光谱，影响将透射谐波光谱与材料潜在电子结构关联的实验结果的解读。该模型可对非微扰区域的强场光-物质相互作用进行自洽描述，为探索相互作用的全经典与量子区域之间的过渡、材料电离的隧穿与多光子区域，以及体材料中谐波产生的微扰与非微扰区域开辟了道路。
英文摘要
We present a theoretical framework for self consistent treatment of nonlinear light-matter interactions in the ultra-fast strong-field regime based on numerical solution of Maxwell's equations and semiconductor Bloch equations. This framework is shown to describe high-order harmonic generation and propagation in bulk semiconductors, investigating differences in reflected and transmitted harmonic spectra due to propagation effects. We show that the propagation of the combined field of the driving laser pulse and generated harmonics in a bulk semiconductor significantly modifies the harmonic spectra, affecting interpretation of experimental results relating the transmitted harmonic spectra to the underlying electronic structure of the material. This model allows the self-consistent description of strong-field light-matter interactions in the non-perturbative regime, opening the way to explore the transition between fully classical and quantum regimes of interaction, tunneling and multiphoton regimes of material ionization, and perturbative and non-perturbative regimes of harmonic generation in bulk materials.
