Pulse-shape control of two-color interference in high-order-harmonic generation
Pulse-shape control of two-color interference in high-order-harmonic generation
复制标题
DOI：
10.1103/physreva.95.013408
复制
发表时间：
2017-01
影响因子：
2.9
通讯作者：
K. Hamilton;H. Hart;A. Brown
中科院分区：
文献类型：
--
作者：
K. Hamilton;H. Hart;A. Brown
我们报告的计算谐波产生氖在混合（800 nm +延时400 nm）激光脉冲计划。与以前的研究相比，我们采用了短（几个周期）400 nm的脉冲，发现这提供了控制的电子轨迹之间的干扰，有助于截止谐波。包含的400 nm的脉冲提高了产量和截止能量，这两者都表现出强烈的依赖于两个脉冲之间的时间延迟。使用时间依赖性R-矩阵理论和经典的轨迹模型相结合，我们评估导致这些影响的机制。
We report on calculations of harmonic generation by neon in a mixed (800-nm + time-delayed 400-nm) laser pulse scheme. In contrast with previous studies we employ a short (few-cycle) 400-nm pulse, finding that this affords control of the interference between electron trajectories contributing to the cutoff harmonics. The inclusion of the 400-nm pulse enhances the yield and cutoff energy, both of which exhibit a strong dependence on the time delay between the two pulses. Using a combination of time-dependent R-matrix theory and a classical trajectory model, we assess the mechanisms leading to these effects.