Observation of laser-assisted electron-impact ionization in ultrashort intense laser fields
Observation of laser-assisted electron-impact ionization in ultrashort intense laser fields
复制标题
超短强激光场中激光辅助电子轰击电离的观测
DOI：
10.1103/physreva.104.062812
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发表时间：
2021
影响因子：
2.9
通讯作者：
Kaoru Yamanouchi
中科院分区：
文献类型：
--
作者：
Takashi Hiroi;Yuya Morimoto;Reika Kanya;Kaoru Yamanouchi
通过对小角度范围内的快电子前向散射和大角度范围内的慢电子发射的符合测量，观察到在超短（1.2ps）近红外强激光场中Ar的激光辅助[LA（）]过程.快电子和慢电子的动能之和的谱在Arorbital的（）峰的单光子能量偏移处表现出肩部结构，这明确地归属于具有单光子能量增益的LA（）过程。在单光子增益条件下，测得的LA（）过程的三重微分截面约为理论估计的两倍，这一增强被认为是Ar光修饰态形成的证据。
A laser-assisted () [LA()] process of Ar in an ultrashort (1.2 ps) near-infrared intense laser field,, was observed by coincidence measurements of the fast electron scattered forward within the small-angle range and the slow electron emitted to the wide-angle range. The spectrum of the sum of the kinetic energies of fast and slow electrons exhibited a shoulder structure at the one-photon energy shift from the () peak for the Arorbital, which was unambiguously assigned to the LA() process with the one-photon energy gain. The determined triply differential cross section of the LA() process with one-photon gain from the laser field was approximately twice as large as a theoretical estimate and this enhancement was regarded as an evidence of the formation of light-dressed states of Ar.