论文标题
使用双脉冲生成具有可调光子能量和光谱宽度的高阶谐波
Generation of high-order harmonics with tunable photon energy and spectral width using double pulses
论文作者
论文摘要
从理论上讲，这项工作研究了由两个时间延迟的超短激光脉冲驱动的稀有气体原子中的高阶谐波产生。除了它们的时间延迟外，这两个脉冲是相同的。使用激光 - 物质相互作用的单原子模型，可以通过改变生成激光脉冲之间的时间延迟来改变一个EV的光子能量在一个EV的范围内可控 - 与基本场的光子能量相当。还证明，双脉冲产生的高阶谐波具有有利的特征，这模仿了极端紫外线（XUV）单色的某些特性。通过提出的方法，与其他方法相比，可以实现更低成本和相对较高的频谱收率的更简单的设置。
This work theoretically investigates high-order harmonic generation in rare gas atoms driven by two temporally delayed ultrashort laser pulses. Apart from their temporal delay, the two pulses are identical. Using a single-atom model of the laser-matter interaction it is shown that the photon energy of the generated harmonics is controllable within the range of one eV -- a bandwidth comparable to the photon energy of the fundamental field -- by varying the time delay between the generating laser pulses. It is also demonstrated that high-order harmonics generated by double pulses have advantageous characteristics, which mimick certain properties of an extreme ultraviolet (XUV) monochromator. With the proposed method, a simpler setup at a much lower cost and comparatively higher spectral yield can be implemented in contrast to other approaches.
