应用不对称性参量对周期量级强激光脉冲下原子电离分布的反演不对称性进行了定量分析.采用非微扰的散射理论解析方法和三个激光模式模拟超短脉冲，研究不对称性参量随激光强度、包络位相和脉冲宽度的变化.计算表明,这种不对称性是随着波包的绝对位相以正弦形式变化而变化，其最大不对称程度依赖于脉冲强度和脉冲宽度.随着激光强度的提高，不对称性参量是先降低到最小值然后增加.对脉冲宽度相对长、有几个周期量级的高强度激光，其不对称性具有显著的特点.因此，提高脉冲强度有助于对包络绝对位相变化的观察.

In accordance with nonperturbative quantum scattering theory, we investigate photoelectron angular distributions (PADs) from above-threshold detachment (ATD) of negative ions irradiated by circularly polarized few-cycle laser fields. Electrons ejected on the polarization plane demonstrate distinct anisotropies in angular distributions which distinctly vary with the carrier-envelope (CE) phase. The anisotropy is caused by interference between transition channels; it also depends strongly on laser frequency, pulse duration, and kinetic energy of photoelectrons. Optimal emission of photoelectrons, which varies with CE phase, makes it possible to control photoelectron motion.

Photoelectron angular distributions (PADs) from two-photon ionization of atoms in linearly polarized strong laser fields are obtained in accordance with the nonperturbative quantum scattering theory. We also study the influence of laser wavelength on PADs. For two-photon ionization very close to the ionization threshold, most of the ionized electrons are vertically ejected to the laser polarization. PADs from two-photon ionization of atoms are determined by the second order generalized phased Bessel function at which the ponderomotive parameter plays a key role. In terms of dependence of PADs on laser wavelength, corresponding variations for the ponderomotive parameter are demonstrated.

利用光电子角分布成像光谱技术原理，以钠原子为例利用双光子共振三光子电离方法研究了从钠原子的4D态双能级电离后所产生的光电子角分布的状态.分析、讨论了多通道电离过程中所产生光电子的干涉效应.分析了光电子的空间角分布各部分的物理意义.结果表明该干涉图谱能够清楚地描绘出光电子能量和空间角分布状态.