Attosecond transient absorption spectrum of argon at the L2,3 edge
Attosecond transient absorption spectrum of argon at the L2,3 edge
复制标题
DOI：
10.1103/physreva.97.031407
复制
发表时间：
2018-03-30
影响因子：
2.9
通讯作者：
Chang, Zenghu
中科院分区：
文献类型：
--
作者：
Chew, Andrew;Douguet, Nicolas;Chang, Zenghu
高次谐波产生方面的进展导致高能阿秒脉冲的产生，截止频率高于碳 1s 边缘（283.8 eV）。这些脉冲对于将时间分辨光谱扩展到水窗口至关重要，以便控制溶剂化有机物质中的电子动力学。在这里，我们报告了实现这一目标的一步：在短波红外控制脉冲存在的情况下，以子周期时间分辨率测量氩气在 2p(-1) L-2,L-3 边缘（类似于 250 eV）的阿秒瞬态吸收光谱。在理论模拟的支持下，测量结果证明了俄歇衰变和隧道电离在多电子原子内价空穴的驱动演化中的同时作用。
Progress in high-harmonic generation has led to high-energy attosecond pulses with cutoff above the carbon 1s edge (283.8 eV). These pulses are essential to extend time-resolved spectroscopies to the water window in order to control electron dynamics in solvated organic species. Here we report a step towards this goal: the measurement, with subcycle time resolution, of the attosecond transient absorption spectrum of argon at the 2p(-1) L-2,L-3 edge (similar to 250 eV) in the presence of a short-wave infrared control pulse. The measurements, supported by theoretical simulations, demonstrate the concurrent role of Auger decay and tunnel ionization in the driven evolution of inner-valence holes of polyelectronic atoms.