论文标题
参数attsond脉冲放大远离高阶谐波生成的电离阈值$^+$
Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He$^+$
论文作者
论文摘要
通过使用3D时间依赖的schr {Ö} dinger方程在高谐波生成过程中，从HE $^+$的激发态中，首次使用3D时间依赖的Schr {Ö} dinger方程来证明，在单原子水平上大约100 eV的Attosond相干脉冲的参数放大。我们介绍了远离电离阈值并解决其背后的物理学的Attosent动力学。特定中央光子能的扩增要求种子XUV脉冲在及时与驱动激光场完全同步，以刺激重组为He $^+$基态，并且仅在与实验测量的几个特定的激光周期中产生。我们的模拟表明，可以通过改变激光场的峰强度来控制放大的光子能区域。我们的结果为实现紧凑型脉冲激光激光器的实现铺平了道路。
Parametric amplification of attosecond coherent pulses around 100 eV at the single-atom level is demonstrated for the first time by using the 3D time-dependent Schr{ö}dinger equation in high-harmonic generation processes from excited states of He$^+$. We present the attosecond dynamics of the amplification process far from the ionization threshold and resolve the physics behind it. The amplification of a particular central photon energy requires the seed XUV pulses to be perfectly synchronized in time with the driving laser field for stimulated recombination to the He$^+$ ground state and is only produced in a few specific laser cycles in agreement with the experimental measurements. Our simulations show that the amplified photon energy region can be controlled by varying the peak intensity of the laser field. Our results pave the way to the realization of compact attosecond pulse intense XUV lasers with broad applications.
