啁啾激光脉冲控制电子纵向动量关联谱研究

Control of Electrons Correlated Longitudinal Momentum Spectra by Chirp Laser Pulses

采用三维半经典再散射模型研究了周期量级啁啾脉冲中He原子非序列双电离电子的纵向(沿激光电场极化方向)动量关联谱,其中一、三象限分布的不对称性对啁啾参数变化很敏感.该性质是由电场分布的不对称性引起的.通过调节啁啾脉冲参数可以比调节一般周期量级脉冲的绝对相位能更灵敏地控制动量关联谱.

Electrons correlated longitudinal momentum spectra of nonsequential double ionization of He atom in few-cycle chirp laser pulses are investigated by a 3D semi-classical re-scattering model.Asymmetry distributions between the first and the third quadrants in the spectra are sensitive to chirp parameter.The longitudinal momentum spectra can be controlled by chirp parameter in few-cycle chirp pulses more sensitively than by CEP in ordinary few-cycle pulses.