三能级原子的激发动力学行为及对共振电离的影响

Dynamics of three-level atoms excited by optical pulses and its influence on resonant ionization

从密度矩阵出发,在适当的近似条件下,导出了三能级原子在双脉冲光场驱动下的类似两能级Bloch方程形式的动力学方程组,并利用数值求解,建立了一套处理程序,考查了双Guoss脉冲作用下三能级原子布居数的时间依赖关系,着重分析了脉冲强度、相对延迟、频率失谐、电离速率等动力学参数对离子产额的影响。

Based on the density matrix, we derived the Blooh-like dynamic equations of three-level atoms driven by two optical pulses, then analyzed them with numerical solutions. We have also examined the time dependences of the atomic populations and ion production. Particular attention has been paid to the relationships between the ion production and the dynamic parameters, such as pulse amplitude, relatively retarded time, frequency detunning and ionization rate.