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arXiv 1312.4151physics.atom-ph
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原子高次谐波产生中的自旋轨道效应

Spin-Orbit Effects in Atomic High-Harmonic Generation

Stefan Pabst, Robin Santra

摘要:

自旋-轨道相互作用导致惰性气体原子的最外层$p_{1/2}$和$p_{3/2}$壳层之间的小能隙。强场脉冲将电子隧穿出任一壳层,导致自旋轨道驱动的空穴运动。这些空穴动力学影响HHG产率。然而,光谱形状以及角分布的HHG发射是不受自旋轨道耦合。通过求解多电子薛定谔方程,采用含时组态相互作用单粒子(TDCIS)方法,研究了氪原子的自旋轨道效应。我们还提供了脉冲参数,这种效果可以在实验中确定通过增强的HHG产量作为强场脉冲的波长增加。

英文摘要:

Spin-orbit interactions lead to small energy gaps between the outer-most $p_{1/2}$ and $p_{3/2}$ shells of noble gas atoms. Strong-field pulses tunnel-ionize an electron out of either shell resulting in spin-orbit-driven hole motion. These hole dynamics affect the HHG yield. However, the spectral shape as well as the angular distribution of the HHG emission is not influenced by spin-orbit coupling. We demonstrate the spin-orbit effect on atomic krypton by solving the multi-electron Schrödinger equation with the time-dependent configuration-interaction singles (TDCIS) approach. We also provide pulse parameters where this effect can be identified in experiments through an enhancement in the HHG yield as the wavelength of the strong-field pulse increases.

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