Coulomb asymmetry in above-threshold ionization.
Coulomb asymmetry in above-threshold ionization.
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DOI：
10.1103/physrevlett.93.233002
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发表时间：
2004-11
影响因子：
8.6
通讯作者：
S. Goreslavski;G. Paulus;S. Popruzhenko;Nikolay I. Shvetsov-Shilovski
中科院分区：
文献类型：
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作者：
S. Goreslavski;G. Paulus;S. Popruzhenko;Nikolay I. Shvetsov-Shilovski
本文提出了一种新的方法来考虑强场激光与原子相互作用中库仑势的影响。通过与能量分辨光电子角分布实验数据的比较，验证了模型的正确性。对于椭圆偏振，它们表现出很强的不对称性。我们的理论表明，这种强烈的不对称性的低能量的电子是由一个小库仑力作用于隧道电子退出隧道后引起的。这与高电子能量的情况相反，在高电子能量的情况下，不对称性通过母离子的再散射而产生。
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.