强激光场中线性多原子分子离子增强电离行为的研究

The Study of the Enhanced Ionization Behavior of Multiatomic Molecular Ions in the Intense Laser Fields

通过数值求解含时薛定谔方程，观察到强激光场中线性多原子分子离子的增强电离（ＥＩ）行为，研究了原子个数、激光频率和强度对增强电离的影响．计算结果表明，随着原子个数的增加，增强电离的趋势基本保持不变，只是电高峰向原子间距小的方向偏移；激光频率的增加，会使发生增强电离的关键键长变小，电离几率也减小；随着激光强度的增加，最大电离几率增加，当强度增加到一定值时，电离几率不再随着原子间距变化而变化．

The enhanced ionization (EI) behavior of linear multiatomic molecular ions is studied in intense laser fields by means of the numerical solution of 1-D time--dependent Schrodinger equation. The influences of the atom number and the laser intensity and the frequency of the laser on EI are studied. The result demonstrates that the EI nearly holds the line with the increasing of atom number. As the laser frequency increases, the critical value of bond length for EI decreases and the ionization probability decreases too. The ionization probability increases with the increasing of the laser intensity. The ionization probability is nearly independent of the atom distance when the increasing intensity reaches a certain value.