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arXiv 1502.00614physics.atom-phquant-ph
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双色强场光电子能谱学及其位相

Two-Color Strong-Field Photoelectron Spectroscopy and the Phase of the Phase

S. Skruszewicz, J. Tiggesbäumker, K. -H. Meiwes-Broer, M. Arbeiter, Th. Fennel, D. Bauer

摘要:

在强激光电离实验中,弱二次谐波场的存在会影响动量分辨电子产率,这取决于$ω$和$2ω$组分之间的相对相位。建议的双色“相位的相位光谱”量化每个最终的电子动量的相对相位衬度(RPC)和“相位的相位”(PP),描述了多少,并与相位滞后,分别作为相对相位的函数的产量变化。给出了稀有气体原子和CO $_2$的RPC和PP谱的实验结果。光谱展示了一个相当普遍的结构,分析的帮助下,一个简单的模型的基础上电子轨迹,波包传播,和(多)再散射。PP和RPC光谱中的细节是目标敏感的,因此可以用于以高精度提取结构(或甚至动态)信息。

英文摘要:

The presence of a weak second-harmonic field in an intense-laser ionization experiment affects the momentum-resolved electron yield, depending on the relative phase between the $ω$ and the $2ω$ component. The proposed two-color 'phase-of-the-phase spectroscopy' quantifies for each final electron momentum a relative-phase contrast (RPC) and a 'phase of the phase' (PP), describing how much and with which phase lag, respectively, the yield changes as function of relative phase. Experimental results for RPC and PP spectra for rare gas atoms and CO$_2$ are presented. The spectra demonstrate a rather universal structure that is analyzed with the help of a simple model based on electron trajectories, wave-packet spreading, and (multiple) rescattering. Details in the PP and RPC spectra are target sensitive and thus may be used to extract structural (or even dynamical) information with high accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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