Structure effects in angle-resolved high-order above-threshold ionization of molecules.
Structure effects in angle-resolved high-order above-threshold ionization of molecules.
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DOI：
10.1103/physrevlett.104.203001
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发表时间：
2010-05
影响因子：
8.6
通讯作者：
Huipeng Kang;W. Quan;Y. Wang;ZhiYang Lin;Minghui Wu;H. Liu;XiaoJun Liu;Bing-Bing Wang-Bing;
中科院分区：
文献类型：
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作者：
Huipeng Kang;W. Quan;Y. Wang;ZhiYang Lin;Minghui Wu;H. Liu;XiaoJun Liu;Bing-Bing Wang-Bing;
我们提出了能量分辨的角分布产生的光电子在阈值以上电离（ATI）的非对齐的双原子分子N2和O2在高强度短激光脉冲，重点是最具活力的光谱的一部分。能量为10 U（p）（U（p）：有质动能）的光电子的角分布，即，在ATI谱的平台截止，被发现是更广泛的O2比在N2。借助于S-矩阵理论和直观的半经典模型分析，我们将这一现象归因于基态分子轨道结构对强场分子电离中高能电子发射的影响。
We present energy-resolved angular distributions of photoelectrons generated in above-threshold ionization (ATI) of nonaligned diatomic molecules N2 and O2 in high-intensity short laser pulses, with emphasis on the most energetic part of the spectra. The angular distribution for photoelectrons with energy of 10U(p) (U(p): ponderomotive energy), i.e., the plateau cutoff in ATI spectra, is found to be broader in O2 than in N2. Resorting to the analyses from both an S-matrix theory and an intuitive semiclassical model, we attribute the observation to the effect of the ground state molecular orbital structure on high-energy electron emission in strong-field molecular ionization.