We have performed single-active-electron numerical calculations of neon- and argonlike atoms interacting with short, intense, circularly polarized laser pulses at wavelengths between 10 nm and 1000 nm. Our results reveal a surprisingly large change by a factor of about 100 in the ionization ratio of electrons in initial states counter-rotating with respect to the field over corotating electrons in the previously unexplored intermediate few-photon ionization regime. The physical mechanism behind this observation is related to resonant enhanced ionization via states close in energy to the initial states. These doorway states are accessible exclusively from the initial state for counter-rotating electrons within the respective wavelength regime. The results may open a new route for controlling the generation of spin-polarized electrons by ultrashort laser pulses.

中文翻译：

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通过超短圆偏振激光脉冲中的门道状态增强反向旋转电子的电离

我们已经对氖和类氩原子与波长在 10 纳米到 1000 纳米之间的短、强、圆偏振激光脉冲相互作用进行了单活性电子数值计算。我们的结果显示，在先前未探索的中间少光子电离机制中，相对于同向旋转电子的场，处于反向旋转的初始状态中电子的电离率发生了约 100 倍的惊人变化。这一观察背后的物理机制与通过能量接近初始状态的状态共振增强电离有关。这些门口状态只能从初始状态访问，以便在相应波长范围内反向旋转电子。