Reconstruction of attosecond pulses in the presence of interfering dressing fields using a 100 kHz laser system at ELI-ALPS
Reconstruction of attosecond pulses in the presence of interfering dressing fields using a 100 kHz laser system at ELI-ALPS
复制标题
在 ELI-ALPS 使用 100 kHz 激光系统在存在干扰修整场的情况下重建阿秒脉冲
DOI：
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
H. Wörner
中科院分区：
文献类型：
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作者：
D. Hammerland;Pengju Zhang;S. Kuehn;P. Jójárt;I. Seres;V. Zuba;Z. Várallyay;D. Charalambidis;K. Osvay;T. Luu;H. Wörner
高强度近红外激光脉冲高次谐波产生的阿秒脉冲串（APT）对研究原子分子的电子动力学具有重要意义。然而，高光子能量、高通量HHG所需的高强度通常将适当的激光系统的类别限制为低于10 kHz的重复率。在这里，产生的APT的100 kHz，160 W，40 fs的激光系统（HR-1）目前正在调试中的极端光基础设施阿秒光脉冲源（ELI-ALPS）使用重建阿秒跳动的双光子跃迁（RABBIT）技术的干扰重建。这些实验构成了第一个阿秒时间分辨光电子能谱测量与阿秒脉冲在100 kHz的重复率和ELI-ALPS进行的第一个实验在项目的框架内调试其新安装的技术。这些RABBIT测量是在额外的IR场暂时锁定到极紫外APT的情况下进行的，从而导致非典型的ω跳动。我们证明了在这些条件下记录的2ω拍频的相位与在二阶微扰理论内的标准RABBIT测量中观察到的相位严格相同。这项工作突出了一个实验简化为未来的实验的基础上阿秒干涉（或RABBIT），这是特别有用的，当使用高平均功率的激光。
Attosecond Pulse Trains (APT) generated by high-harmonic generation (HHG) of high-intensity near-infrared (IR) laser pulses have proven valuable for studying the electronic dynamics of atomic and molecular species. However, the high intensities required for high-photon-energy, high-flux HHG usually limit the class of adequate laser systems to repetition rates below 10 kHz. Here, APT’s generated from the 100 kHz, 160 W, 40 fs laser system (HR-1) currently under commissioning at the extreme light infrastructure attosecond light pulse source (ELI-ALPS) are reconstructed using the reconstruction of attosecond beating by interference of two-photon Transitions (RABBIT) technique. These experiments constitute the first attosecond time-resolved photoelectron spectroscopy measurements with attosecond pulses performed at 100 kHz repetition rate and one of the first experiments performed at ELI-ALPS in the framework of projects commissioning its newly installed technologies. These RABBIT measurements were taken with an additional IR field temporally locked to the extreme-ultraviolet APT, resulting in an atypical ω beating. We show that the phase of the 2ω beating recorded under these conditions is strictly identical to that observed in standard RABBIT measurements within second-order perturbation theory. This work highlights an experimental simplification for future experiments based on attosecond interferometry (or RABBIT), which is particularly useful when lasers with high average powers are used.
影响因子：
56.9
作者：
Schultze, M.;Fiess, M.;Yakovlev, V. S.
通讯作者：
Yakovlev, V. S.