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arXiv 1401.7401physics.optics
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用“空气laser“光谱实时观测转动分子波包动力学

Real-time observation of dynamics in rotational molecular wave packets by use of "air laser" spectroscopy

Bin Zeng, Wei Chu, Guihua Li, Jinping Yao, Haisu Zhang, Jielei Ni, Chenrui Jing, Hongqiang Xie, Ya Cheng

摘要:

利用强场电离诱导氮分子转动光谱研究了无场分子排列中由量子转动态相干叠加而成的转动波包随时间的演化。我们表明,这种技术独特地允许实时观察的超快动态的旋转波包中的个别旋转状态。我们的分析还表明,氮激光存在两个产生通道,揭示了强飞秒激光脉冲产生的空气激光背后的粒子数反转机制。

英文摘要:

Molecular rotational spectroscopy based on strong-field-ionization-induced nitrogen laser is employed to investigate the time evolution of the rotational wave packet composed by a coherent superposition of quantum rotational states created in a field-free molecular alignment. We show that this technique uniquely allows real-time observation of the ultrafast dynamics of the individual rotational states in the rotational wavepacket. Our analysis also shows that there exist two channels of generation of the nitrogen laser, shedding new light on the population inversion mechanism behind the air laser generated by intense femtosecond laser pulses.

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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