超短激光脉冲的绝对相位对三能级Λ型原子布居的影响

The Influence of Absolute Phase on Population of Three-Level Λ-Type Atoms

通过数值求解含时薛定谔方程,研究超短激光脉冲与三能级Λ型原子相互作用过程中影响原子电离态跃迁几率的几个因素,如:绝对相位,啁啾率等。研究结果表明激光绝对相位、啁啾率的大小是关系态跃迁几率的重要因素,通过调节超短激光脉冲的绝对相位和啁啾率,可以将态跃迁几率控制到较大的水平。本文研究结果为实验上对态跃迁几率的控制提供了相关理论基础。

By using the factors, such as absolute numerical solution of time-dependent shrodinger equation, the paper studies a few phase and chirp rate that affect the transfer probability in the process that ultrashort laser pulses interact with three-level A -type atoms. It is found that absolute phase and chirp rate are important factors that affect the transfer probability. By modulating absolute phase and chirp rate, we can achieve the maximal transfer probability can be achieved. This result supports the control of transfer probability experimentally.