Goreslavski S P, Paulus G G, Popruzhenko S V, Shvetsov-Shilovski N I
Moscow State Engineering Physics Institute, Kashirskoe Shosse 31, 115409 Moscow, Russia.
Phys Rev Lett. 2004 Dec 3;93(23):233002. doi: 10.1103/PhysRevLett.93.233002. Epub 2004 Nov 30.
A new method for including effects of the Coulomb potential in strong-field laser atom interaction is presented. The model is tested by comparing its results with experimental data of energy resolved angular distributions of photoelectrons. For elliptical polarization these exhibit a strong asymmetry. Our theory shows that this strong asymmetry for the low-energy electrons is induced by a small Coulomb force acting on the tunneling electron just after the exit of the tunnel. This is in contrast to the situation for high electron energies where the asymmetry arises via rescattering by the parent ion.
提出了一种在强场激光与原子相互作用中考虑库仑势效应的新方法。通过将该模型的结果与光电子能量分辨角分布的实验数据进行比较来对其进行检验。对于椭圆偏振，这些数据呈现出强烈的不对称性。我们的理论表明，低能电子的这种强烈不对称性是由隧道出口后作用于隧穿电子的小库仑力引起的。这与高电子能量的情况不同，在高电子能量情况下，不对称性是通过母离子的再散射产生的。
