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arXiv 1503.07324physics.atom-phquant-ph
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强子周期脉冲驱动下原子气体的近电离阈值发射

Near-ionization-threshold emission in atomic gases driven by intense sub-cycle pulses

Wei-Chun Chu, John C. Travers, Philip St. J. Russell

摘要:

本文从理论上研究了强亚周期脉冲驱动下氢原子的偶极辐射。通过从头计算求解含时的薛定谔方程,得到了体系的偶极响应。值得注意的是,持续时间比驱动脉冲更长的窄带发射出现在电离阈值以上的频率。使用强场近似的额外计算也恢复了这种发射,这表明它对应于行为类似于里德伯电子的近束缚电子的振荡。预测的现象是独特的超短驱动脉冲,但不特定于任何特定的原子结构。

英文摘要:

We study theoretically the dipole radiation of a hydrogen atom driven by an intense sub-cycle pulse. The time-dependent Schrödinger equation for the system is solved by ab initio calculation to obtain the dipole response. Remarkably, a narrowband emission lasting longer than the driving pulse appears at a frequency just above the ionization threshold. An additional calculation using the strong field approximation also recovers this emission, which suggests that it corresponds to the oscillation of nearly-bound electrons that behave similarly to Rydberg electrons. The predicted phenomenon is unique to ultrashort driving pulses but not specific to any particular atomic structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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