论文标题
在紫外线注射下固体中扩展谐波产生的多曲线动力学
Multiband dynamics of extended harmonic generation in solids under ultraviolet injection
论文作者
论文摘要
使用一维半导体BLOCH方程，我们在截止扩展方案中使用带有额外紫外线注射的红外脉冲进行了截止扩展方案中电子动力学。首先对扩展的三步模型进行了验证，以在第二个高原发射谐波中发挥主导作用。出乎意料的是，采用加速定理的进一步分析表明，尽管主要和次要的谐波均存在正和阴性chirp，但第一个区域的正（负）chirp与所谓的短（长（长）轨迹）有关，而第二个区域中的频率则通过“通用”轨迹发出，而Electrons tunneling则早些时候造成了Electrons Tunneling的贡献。新颖的特征加深了对固体中高谐波产生的理解，并且可能在带边缘以外的阶段科学和重建频带分散方面具有重要意义。
Using one-dimensional semiconductor Bloch equations, we investigate the multiband dynamics of electrons in a cutoff extension scheme employing an infrared pulse with additional UV injection. An extended three-step model is firstly validated to play a dominant role in emitting harmonics in the second plateau. Surprisingly, further analysis employing the acceleration theorem shows that though harmonics in both the primary and secondary present positive and negative chirps, the positive (negative) chirp in the first region is related to the so-called short (long) trajectory, while that in the second region is emitted through `general' trajectory, where electrons tunnelling earlier and recombining earlier contribute significantly. The novel characteristics deepen the understanding of high harmonic generation in solids and may have great significance in attosecond science and reconstruction of band dispersion beyond the band edge.
