Characteristic spectrum of very low-energy photoelectron from above-threshold ionization in the tunneling regime.
Characteristic spectrum of very low-energy photoelectron from above-threshold ionization in the tunneling regime.
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DOI：
10.1103/physrevlett.109.043001
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发表时间：
2012-07
影响因子：
8.6
通讯作者：
Chengyin Wu;Yudong Yang;Yunquan Liu;Qihuang Gong;Minghui Wu;Xueting Liu;X. Hao;Wei-Dong Li;Xiantu He;Jing Chen
中科院分区：
文献类型：
--
作者：
Chengyin Wu;Yudong Yang;Yunquan Liu;Qihuang Gong;Minghui Wu;Xueting Liu;X. Hao;Wei-Dong Li;Xiantu He;Jing Chen
报道了超短强红外激光脉冲与惰性气体原子相互作用中极低能光电子隧穿电离过程的实验和理论研究。一个普遍的峰值结构，电子能量远低于1 eV的光电子能谱，对应于双峰结构的纵向动量分布，实验确定为所有的原子物种。我们的量子和半经典分析揭示了长程库仑势在这种非常低的能量峰结构的生产中的作用。
We report an experimental and theoretical study of very low-energy photoelectrons in tunneling ionization process from noble gas atoms interacting with ultrashort intense infrared laser pulses. A universal peak structure with electron energy well below 1 eV in the photoelectron spectrum, corresponding to the double-hump structure in the longitudinal momentum distribution, is identified experimentally for all atomic species. Our quantum and semiclassical analysis reveal the role of long-range Coulomb potential in the production of this very low-energy peak structure.