摘要
Based on the nonperturbative quantum electrodynamics scattering theory for multiphoton ionization developed recently,high-order harmonic generated in the ionization process is discussed.The influence of the Coulomb potential is treated as a perturbation in the expansion of the transition matrix.It is deduced that the harmonic photons are emitted in the resonant process during ionization and the width of the harmonic peaks is just the ionization rate of the atom.
作者
CHEN Jing
CHEN Shi-Gang
LIU Jie
陈京;陈式刚;刘杰(Institute of Theoretical Physics,Chinese Academy of Science,Beijing 100080;Institute of Applied Physics and Computational Mathematics,P.O.Box 8009,Beijing 100088)
基金
Supported by the National Natural Science Foundation of China under Grant No.19674017
the strong field physics item of 973 project and the China Academy of Engineering Physics Foundation.
