Dependence of photoelectron-momentum distribution of H-2( ) molecule on orientation angle and laser ellipticity
Dependence of photoelectron-momentum distribution of H-2( ) molecule on orientation angle and laser ellipticity
复制标题
H-2( )分子的光电子动量分布对取向角和激光椭圆率的依赖性
DOI：
10.1088/1674-1056/28/5/053201
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发表时间：
2019
影响因子：
1.7
通讯作者：
Liu Xue Shen
中科院分区：
文献类型：
--
作者：
Zhang Hong Dan;Zhang Si Qi;Ji Lei;Zhen Qi;Guo Jing;Liu Xue Shen
通过数值求解冻结核近似下二维随时间变化的Schrödinger方程，研究了在不同椭圆度的椭圆偏振激光脉冲驱动下，h2 +在不同取向角下的分子光电子-动量分布。数值结果表明，MPMD对取向角和激光椭圆度敏感，这可以用阿秒微扰电离理论和精确可解的光电离模型来解释。当椭圆度ε= 0时，x取向h2 +的最终MPMD呈现明显的六瓣模式，与ε= 0.5和ε= 1时不同。电子波包（EWP）和MPMD与x取向h2 +的演化解释了这种独特的模式。(纸)
By numerically solving the two-dimensional time-dependent Schrödinger equation under the frozen-nuclei approximation, we are able to study the molecular photoelectron-momentum distribution (MPMD) of H 2+ with different orientation angles driven by elliptically polarized laser pulse with varying ellipticities. Our numerical results show that the MPMD is sensitive to the orientation angle and the laser ellipticity, which can be explained by the attosecond perturbation ionization theory and the exactly solvable photoionization model. When the ellipticity ε= 0, the final MPMD of x-oriented H 2+ shows a distinct six-lobe pattern that is different from that with ε= 0.5 and ε= 1. The evolutions of electron wave packet (EWP) and MPMD with x-oriented H 2+ are presented to interpret this distinct pattern.(paper)