Phase-dependent atomic ionization in few-cycle intense laser fields
Phase-dependent atomic ionization in few-cycle intense laser fields
复制标题
DOI：
10.1103/physreva.74.031405
复制
发表时间：
2006-09
影响因子：
2.9
通讯作者：
X. Tong;K. Hino;N. Toshima
中科院分区：
文献类型：
--
作者：
X. Tong;K. Hino;N. Toshima
通过求解含时薛定谔方程，研究了载流子包络（CE）相位依赖的阈上电离（ATI）过程。我们模拟的CE相位相关ATI光谱从右侧和左侧是在很好的协议与Paulus等人的实验测量。通过比较我们从头计算的ATI谱与实验结果，我们更准确地提取了CE相。此外，在我们目前的含时方案中，我们将电离过程分为两个步骤，（a）电子波包的产生和（B）波包在激光场中的传播。因此，通过追溯电离电子的起源，我们清楚地识别出低能电子来自激光场的直接电离，而高能电子来自被激光场反弹并与母体离子核碰撞的电子，如图1所示。
We studied the carrier-envelope (CE) phase dependent above threshold ioniza- tion (ATI) process by solving the time-dependent Schrodinger equation. Our simulated CE phase dependent ATI spectra from the right and left sides are in good agreement with the experimental measurements by Paulus et al. 1 . By comparing our ab inito calculated ATI spectra with the experiment ones, we abstract the CE phase more accurately. Furthermore, in our present time- dependent scheme, we separate the ionization processes into two steps, (a) creation of an electron wavepacket and (b) propagation of the wavepacket in the laser field. Thus, by tracing back the origin of the ionized electron, we clearly identify that the low energy electrons come from the direct ionization by the laser field and the high energy electrons come from the electron bounced back by the laser field and recolliding with the parent ionic core as shown in Fig. 1.