The electron scattering process has been investigated by analyzing the interference structure in the photoelectron momentum distribution (PMD) of a hydrogen atom exposed to a single-cycle linearly polarized near-infrared laser field, based on the numerical solution of the full-dimensional time-dependent Schrödinger equation and the Coulomb correlative classical trajectory simulation. The interference pattern in the PMD is closely related to the form of the ultrashort pulse which is dominated by the carrier-envelope phase. A fish-bone-like pattern appears in the PMD using the sine electric field and a spider-like pattern appears using the cosine electric field. These interference structures reflect the scattering process. It is found that the stripe density of the spider-like pattern is mainly dominated by the recollision time of scattering electron trajectories, i.e., the longer the recollision time, the greater the stripe density. Therefore, the photoelectron interference pattern can be used to understand the ionization and scattering processes, and identify these processes on the attosecond time scale.

中文翻译：

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使用单周期近红外激光脉冲探索光电子动量分布对超快电子的碰撞

根据全尺寸时域的数值解，通过分析暴露于单周期线性偏振近红外激光场中的氢原子的光电子动量分布（PMD）中的干涉结构，研究了电子散射过程。相依Schrödinger方程和库仑相关经典轨迹模拟。PMD中的干扰模式与超短脉冲的形式密切相关，该脉冲由载流子-包络相位控制。使用正弦电场，鱼骨状图案出现在PMD中，使用余弦电场，鱼骨状图案出现。这些干涉结构反映了散射过程。发现蜘蛛状图案的条纹密度主要由散射电子轨迹的重新碰撞时间决定，即重新碰撞时间越长，条纹密度越大。因此，光电子干涉图样可用于了解电离和散射过程，并在亚秒级时标上识别这些过程。