Angle-resolved high-order above-threshold ionization of a molecule: sensitive tool for molecular characterization.
Angle-resolved high-order above-threshold ionization of a molecule: sensitive tool for molecular characterization.
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DOI：
10.1103/physrevlett.100.203003
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发表时间：
2008-05
影响因子：
8.6
通讯作者：
M. Busuladžić;A. Gazibegović-Busuladžić;D. Milošević;W. Becker
中科院分区：
文献类型：
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作者：
M. Busuladžić;A. Gazibegović-Busuladžić;D. Milošević;W. Becker
本文将强激光场电离双原子分子的强场近似推广到包括电离电子离开分子母离子各中心的再散射。由此产生的光谱及其干涉结构强烈依赖于基态分子轨道的对称性。对于N2，如果激光偏振垂直于分子轴，我们观察到发射光谱中的明显最小值，其在焦点平均中幸存并允许确定，例如，核间的分离相反，对于O2，在相同的情况下不存在再散射。
The strong-field approximation for ionization of diatomic molecules by an intense laser field is generalized to include rescattering of the ionized electron off the various centers of its molecular parent ion. The resulting spectrum and its interference structure strongly depend on the symmetry of the ground state molecular orbital. For N2, if the laser polarization is perpendicular to the molecular axis, we observe a distinct minimum in the emission spectrum, which survives focal averaging and allows determination of, e.g., the internuclear separation. In contrast, for O2, rescattering is absent in the same situation.