Chemical Physics Letters ( IF 2.8 ) Pub Date : 2020-11-06 , DOI: 10.1016/j.cplett.2020.138136 Jun-Gang Fan , Xiang-Yang Miao , Xiang-Fu Jia
Novel method for controlling the high-order harmonic generation in solids with few cycle nonlinear chirped driver laser pulses is proposed. High-order-harmonic generation (HHG) is simulated by solving the one-dimensional (1D) time-dependent Schrödinger equation. The quantum path of HHG is complex in solid system, multichannel contribution in the plateau region is identified and manipulated in this paper. Our results show that negative chirp can broaden the second plateau of HHG when the time point of the chirped central frequency remains unchanged. The physical mechanism is discussed by the time-frequency, quasi-classical analysis and population in each energy band.
中文翻译:
通过在chi中雕刻波形来控制高次谐波的产生
提出了一种利用很少的周期非线性chi驱动激光脉冲来控制固体中高次谐波产生的新方法。通过求解一维(1D)时间相关的Schrödinger方程来模拟高次谐波生成(HHG)。在固体系统中,HHG的量子路径是复杂的,本文确定并操纵了高原区域的多通道贡献。我们的结果表明,当the中心频率的时间点保持不变时,负chi可以扩大HHG的第二平稳期。通过时间频率,准经典分析和每个能带中的填充量讨论了物理机理。