论文标题
库仑散射在强场隧道电离中诱导时间滞后
Coulomb scattering inducing time lag in strong-field tunneling ionization
论文作者
论文摘要
我们研究了强椭圆形的激光场中原子的电离。我们专注于光电子动量分布中偏移角的物理起源及其与特定时间的可能关系。通过开发基于强场近似值并考虑经典库仑散射的模型，我们能够定量地解释在激光和原子参数的广泛区域的最新attoclock实验。当电子通过隧道出口激光库仑形成的屏障时，偏移角可以理解为由于电子的散射而产生的。散射时间表现为库仑引起的电离时间滞后，并以偏移角度编码。
We study ionization of atoms in strong elliptically-polarized laser fields. We focus on the physical origin of the offset angle in the photoelectron momentum distribution and its possible relation to a specific time. By developing a model which is based on strong-field approximation and considers the classical Coulomb scattering, we are able to quantitatively explain recent attoclock experiments in a wide region of laser and atomic parameters. The offset angle can be understood as arising from the scattering of the electron by the ionic potential when the electron exits the laser-Coulomb-formed barrier through tunneling. The scattering time is manifested as the Coulomb-induced ionization time lag and is encoded in the offset angle.
