啁啾Gauss飞秒脉冲驱动三能级系统的超快布居转移

Ultrafast population transfer in a three-level system driven by the chirped Gauss femtosecond pulse

利用不含旋波近似(RWA)的Schrdinger方程的数值解,研究了线性极化的啁啾Gauss飞秒激光脉冲驱动Ξ型三能级原子系统的超快粒子布居转移。研究结果表明,粒子布居转移主要决定于驱动激光场的Rabi频率(强度)和啁啾率,两跃迁偶极距的比值和脉宽对粒子布居转移也有明显的影响。通过适当选择以上参量的取值,可以实现粒子布居99.6%的转移。

The ultrafast particle population transfer in a ■-type three-level atomic system driven by linearly polarized chirped Gauss femtosecond laser pulse is investigated by using numerical solution of the Schrdinger equation without the rotating wave approximation（RWA）.It is shown that the population transfer is mainly determined by the Rabi frequency（intensity） of the driving laser field and chirp rate,and the ratio of two dipole moments and the pulse width also have obvious effect on the population transfer.By choosing suitable values of the above parameters,nearly complete population transfer（99.6%） can be realized.