Ultrafast Two-Electron Orbital Swap in Li Initiated Attosecond Pulses

被引：2
作者：
Jiang, Hui [1 ,2 ]
Zhang, Zhao-Han [1 ,2 ]
Li, Yang [1 ,2 ]
Ruiz, Camilo [3 ]
He, Feng [1 ,2 ,4 ]
机构：
[1] Shanghai Jiao Tong Univ, Key Lab Laser Plasmas, Minist Educ, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Sch Phys & Astron, Shanghai 200240, Peoples R China
[3] Univ Salamanca, Inst Univ Fis Fundamental & Matemat, Plaza de la Merced S N, Salamanca 37008, Spain
[4] CAS Ctr Excellence Ultraintense Laser Sci, Shanghai 201800, Peoples R China
来源：
ULTRAFAST SCIENCE | 2023年 / 3卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
ELECTRON-IMPACT IONIZATION; SPIN POLARIZATION; GENERATION; PHOTOIONIZATION;
D O I：
10.34133/ultrafastscience.0028
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A universal mechanism of ultrafast 2 -electron orbital swap is discovered through 2 -photon sequential double ionization of Li. After a 1s electron in Li is ionized by absorbing an extreme ultraviolet photon, the other 2 bound electrons located on 2 different shells have either parallel or antiparallel spin orientations. In the latter case, these 2 electrons are in the superposition of the singlet and triplet states with different energies, forming a quantum beat and giving rise to the 2 -electron orbital swap with a period of several hundred attoseconds. The orbital swap mechanism can be used to manipulate the spin polarization of photoelectron pairs by conceiving the attosecond-pump attosecond-probe strategy and thus serves as a knob to control spin -resolved multielectron ultrafast dynamics.
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页数：9
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