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arXiv 1409.2852physics.chem-ph
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Laser驱动的CO集体振动局域化

Laser-Driven Localization of Collective CO Vibrations in Metal-Carbonyl Complexes

Mateusz Lisaj, Oliver Kühn

摘要:

使用钴二羰基络合物的例子表明,两个垂直偏振的IR激光脉冲可以用来触发激发的离域CO伸缩模式,这对应于一个CO键内的振动的交替本地化。在两个键中的任一个中定位的切换时间由对称和不对称的基本跃迁频率之间的能隙确定。两个局部键激发之间的振荡的相位可以通过两个脉冲的相对相位来调谐。由于势能面的非谐性导致波包色散,限制了键局域化控制的范围。这防止了在所考虑的示例中将这样的简单脉冲方案用于激光驱动的键断裂。

英文摘要:

Using the example of a cobalt dicarbonyl complex it is shown that two perpendicularly polarized IR laser pulses can be used to trigger an excitation of the delocalized CO stretching modes, which corresponds to an alternating localization of the vibration within one CO bond. The switching time for localization in either of the two bonds is determined by the energy gap between the symmetric and asymmetric fundamental transition frequencies. The phase of the oscillation between the two local bond excitations can be tuned by the relative phase of the two pulses. The extend of control of bond localization is limited by the anharmonicity of the potential energy surfaces leading to wave packet dispersion. This prevents such a simple pulse scheme from being used for laser-driven bond breaking in the considered example.

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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