Multiorbital tunneling ionization of the CO molecule.
Multiorbital tunneling ionization of the CO molecule.
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DOI：
10.1103/physrevlett.108.183001
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发表时间：
2012-03
影响因子：
8.6
通讯作者：
J. Wu;L. Schmidt;M. Kunitski;M. Meckel;S. Voss;H. Sann;H. Kim;T. Jahnke;A. Czasch;R. Dörner
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文献类型：
--
作者：
J. Wu;L. Schmidt;M. Kunitski;M. Meckel;S. Voss;H. Sann;H. Kim;T. Jahnke;A. Czasch;R. Dörner
利用圆偏振和椭圆偏振飞秒激光脉冲，分别测量了CO分子单、双电离的分子坐标系光电子角分布和离子动量和分布。各种动能释放的方向依赖的电离率使我们能够单独识别多个轨道的电离，范围从最高占用到下两个较低的分子轨道，在我们的实验中观察到的各种通道。不仅跟踪单个电子的发射，而且跟踪两个电子从多个轨道的顺序隧穿动力学。我们的结果证实了电离轨道的形状决定了CO分子中的强激光场隧穿电离，而线性斯塔克效应起着次要的作用。
We coincidently measure the molecular-frame photoelectron angular distribution and the ion sum-momentum distribution of single and double ionization of CO molecules by using circularly and elliptically polarized femtosecond laser pulses, respectively. The orientation dependent ionization rates for various kinetic energy releases allow us to individually identify the ionizations of multiple orbitals, ranging from the highest occupied to the next two lower-lying molecular orbitals for various channels observed in our experiments. Not only the emission of a single electron, but also the sequential tunneling dynamics of two electrons from multiple orbitals are traced step by step. Our results confirm that the shape of the ionizing orbitals determine the strong laser field tunneling ionization in the CO molecule, whereas the linear Stark effect plays a minor role.