中国物理B ›› 2012, Vol. 21 ›› Issue (11): 113101-113101.doi: 10.1088/1674-1056/21/11/113101
• ATOMIC AND MOLECULAR PHYSICS • 上一篇 下一篇
付妍卓, 赵松峰, 周效信
Fu Yan-Zhuo (付妍卓), Zhao Song-Feng (赵松峰), Zhou Xiao-Xin (周效信 )
摘要: We study the ionization probabilities of atoms by a short laser pulse with three different theoretical methods, i.e. the numerical solution of time-dependent Schrödinger equation (TDSE), Perelomov-Popov-Terent'ev (PPT) theory and Ammosov-Delone-Krainov (ADK) theory. Our results show that laser intensity dependent ionization probabilities of several atoms (i.e. H, He, and Ne) obtained from the PPT theory accord quite well with the TDSE results both in the multiphoton and tunneling ionization regimes, while the ADK results fit well to the TDSE data only in the tunneling ionization regime. Our calculations also show that laser intensity dependent ionization probabilities of H atom at three different laser wavelengths of 600 nm, 800 nm, and 1200 nm obtained from the PPT theory are also in good agreement with those from the TDSE, while the ADK theory fails to give the wavelength dependence of ionization probability. Only when the laser wavelength is long enough, will the results of ADK be close to those of TDSE.
中图分类号: (Semiclassical methods)