Dynamics of Rydberg states and terahertz waves generated in strong few-cycle laser pulses

被引:7
作者
Liu, Jinlei [1 ]
Zhao, Jing [1 ]
Huang, Yindong [1 ,2 ]
Wang, Xiaowei [1 ]
Zhao, Zengxiu [1 ]
机构
[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Peoples R China
[2] AMS, Natl Innovat Inst Def, Beijing 100071, Peoples R China
基金
中国国家自然科学基金;
关键词
FIELD; IONIZATION; EMISSION; ATOMS; PHASE; AIR;
D O I
10.1103/PhysRevA.102.023109
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Physical processes near threshold in strong-field ionization are complex owing to the important role of many intermediate states. Two typical near-threshold processes in few-cycle laser pulses, the generations of Rydberg electrons and terahertz waves, are investigated using classical trajectory Monte Carlo simulations. Mapping final energies of electrons to the tunneling coordinates, the two processes are distinguished based on the contributions from different kinds of electron trajectories, which highlights the complex interplay between the Coulomb potential and the laser field on the electron dynamics. We clarify the dependence of momentum and energy spectra on the carrier-envelope phase. We find that the optimal phases for terahertz wave generation and creation of the Rydberg state in few-cycle laser pulses are opposite. This finding can be applied to further experiments on attosecond electron dynamics.
引用
收藏
页数:7
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