Controlling molecular rotational population by wave-packet interference.
Controlling molecular rotational population by wave-packet interference.
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DOI：
10.1063/1.3155063
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
Chengyin Wu;G. Zeng;Yunan Gao;N. Xu;Liang-You Peng;Hongbing Jiang;Q. Gong
中科院分区：
文献类型：
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作者：
Chengyin Wu;G. Zeng;Yunan Gao;N. Xu;Liang-You Peng;Hongbing Jiang;Q. Gong
我们提出了一种利用波包干涉选择分子转动态布居的控制方案。利用两束飞秒强激光脉冲对分子进行非绝热转动激发，产生了一系列相干转动波包。通过调节两个激光脉冲之间的时间延迟，这些波包之间的相长或相消干涉使得能够针对特定的旋转状态增强或抑制布居。旋转波包与选定的人口的演变产生的干涉图案与控制空间对称性。该方法提供了一种在无场条件下制备具有选定量子态分布和可控空间分布的分子系综的方法。
We propose a control scheme for selecting populations of molecular rotational states by wave-packet interference. A series of coherent rotational wave packets is created by nonadiabatic rotational excitation of molecules using two strong femtosecond laser pulses. By adjusting the time delay between the two laser pulses, constructive or destructive interference among these wave packets enables the population to be enhanced or suppressed for a specific rotational state. The evolution of the rotational wave packet with selected populations produces interference patterns with controlled spatial symmetries. This method provides an approach to prepare a molecular ensemble with selected quantum-state distributions and controlled spatial distributions under field-free condition.