Attosecond transient absorption spectrum of argon at the L-2,L-3 edge

作者：Chew Andrew; Douguet Nicolas; Cariker Coleman; Li Jie; Lindroth Eva; Ren Xiaoming; Yin Yanchun; Argenti Luca; Hill Wendell T III; Chang Zenghu^*

来源：Physical Review A, 2018, 97(3): 031407.

DOI：10.1103/PhysRevA.97.031407

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.

• 出版日期2018-3-30