Momentum Vortices on Pairs Production by Two Counter-Rotating Fields
Momentum Vortices on Pairs Production by Two Counter-Rotating Fields
复制标题
两个反向旋转磁场对产生的动量涡旋
DOI：
10.1103/physrevd.96.076010
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发表时间：
2017
影响因子：
5
通讯作者：
Xie B. S.
中科院分区：
文献类型：
--
作者：
Li Z. L.;Li Y. J.;Xie B. S.
通过研究两个圆偏振场在偏振平面上产生的多光子对的动量结构，研究了多光子对的产生。在动量谱上，不同于具有常见拉姆齐干涉条纹的同心环，对于两个相反的利手场，发现明显的涡旋结构是由阿基米德螺线构成的。对其潜在的物理原因进行了分析和讨论。研究还发现，涡旋图样对相对载流子包络相位、时间延迟和两场的左右手效应都很敏感，可以作为探测外加激光场特性的一种方法。
Multiphoton pair production is investigated by focusing on the momentum structures of produced pairs in the polarization plane for the two circularly polarized fields. Upon the momentum spectra, different from the concentric rings with the familiar Ramsey interference fringes for the same handedness, however, the obvious vortex structures are found constituted by the Archimedean spirals for two opposite handedness fields. The underlying physical reasons are analyzed and discussed. It is also found that the vortex patterns are sensitive to the relative carrier envelope phase, the time delay, and the handedness of two fields, which can be used to detect the applied laser field characteristics as a probe way.