Dependence of nonsequential double ionization of He on intensity ratio of orthogonal two-color field

作者：Tong Ai-Hong^*; Feng Guo-Qiang; Deng Yong-Ju

来源：Acta Physica Sinica, 2012, 61(9): 093303.

• orthogonal two-color field
• intensity ratio
• recollision time
• recollision angle

Using classical ensemble model, the dependence of nonsequential double ionization of He on intensity ratio of orthogonal two-color field is investigated. It is shown that this dependence is related to the relative phase(phi) of two-color pulse. When phi = 0.25 pi, with intensity ratio increasing, correlated momentum distribution along the polarization of long wavelength field changes from correlation to anticorrelation pattern; when phi = 0.35 pi, 0.45 pi, correlated momenta are mainly distributed, in the first and third quadrants, correlation pattern is nearly unchanged with the variation of intensity ratio. Back analyses of recollision time, recollision angle, recollision momentum of double ionization trajectories are responsible for the above results, and reveal the control of recollision time and the recollision angle in NSDI by orthogonally polarized two-color field.

• 出版日期2012-5
• 单位湖北第二师范学院