Off-axis low-energy structures in above-threshold ionization
Off-axis low-energy structures in above-threshold ionization
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DOI：
10.1103/physreva.90.023412
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发表时间：
2014-08
影响因子：
2.9
通讯作者：
M. Möller;F. Meyer;A. M. Sayler;G. Paulus;M. Kling;B. Schmidt;W. Becker;D. Milošević
中科院分区：
文献类型：
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作者：
M. Möller;F. Meyer;A. M. Sayler;G. Paulus;M. Kling;B. Schmidt;W. Becker;D. Milošević
在长激光波长下，阈上电离电子谱的速度图呈现出垂直于激光偏振方向的特征结构，呈三叉或三叉叉状。这种叉状结构在几个周期的激光脉冲下消失。这是解释的经典电子轨迹模型的强场电离增强，以便允许重新散射。分析揭示了它与所谓的低能量结构的关系，这是最近观察到的非常小的横动量。
The velocity map of the above-threshold ionization electron spectrum at long laser wavelength exhibits a characteristic structure normal to the laser polarization, which has the appearance of a trident or a three-pronged fork. The forklike structure vanishes for few-cycle laser pulses. It is explained in terms of the classical-electron-trajectories model of strong-field ionization augmented so as to allow for rescattering. The analysis reveals its relation to the so-called low-energy structure, which was recently observed for very small transverse momenta.