Core-resonance line-shape analysis of atoms undergoing strong-field ionization
Core-resonance line-shape analysis of atoms undergoing strong-field ionization
复制标题
强场电离原子的核心共振线形分析
DOI：
10.1088/1361-6455/ac9872
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hartmann M
中科院分区：
文献类型：
--
作者：
Hartmann M
利用阿秒暂态吸收光谱对近红外泵浦脉冲和极紫外(XUV)探测脉冲重叠的时间延迟进行了研究，研究了在强场电离过程中氙离子吸收谱线建立过程中的亚周期结构与泵浦强度的关系。我们观察到离子4d-5p共振的线形不对称性呈现半周期周期变化。通过对线形的分析，我们发现诱导偶极发射的位相发生了变化，并且这种位相调制的幅度随着激光强度的增加而减小。我们讨论了基态耗尽对XUV辅助强场电离中干涉路径的影响。
Using attosecond transient absorption spectroscopy for time delays where the near-infrared pump and the extreme ultraviolet (XUV) probe pulses overlap, sub-cycle structures in the build-up of absorption lines in xenon ions are investigated as a function of the pump intensity during strong-field ionization. We observe a half-cycle-periodic change in the line-shape asymmetry of the ionic 4d–5p resonances. Analyzing the line shapes, we find that in particular the phase of the induced dipole emission is modified, and the magnitude of this phase modulation decreases with increasing laser intensity. We discuss the influence of ground state depletion on interfering pathways involved in XUV-assisted strong-field ionization.