论文标题
电子涡流的载体 - Envelope-phase and Helicity Contraction
Carrier-envelope-phase and helicity control of electron vortices in photodetachment
论文作者
论文摘要
在强圆极化的孤立超用光激光脉冲或通过（旋转或反向偏振的反射极化）成对的H $^ - $阴离子中的电子涡旋和动量螺旋形成。证明每个单个脉冲的载体 - 内维波相（CEP）和螺旋性可用于在光检查的概率幅度中积极操纵和控制涡度模式。具体而言，可以随着改变驱动脉冲的CEP（或两个旋转脉冲），可以在极化平面中旋转概率幅度的二维映射；因此，提供了一种新的现场表征工具。此外，结果表明，螺旋形成或涡旋的歼灭直接与激光场的时间反转对称性有关，这是由一对具有相反螺旋性和CEPS的脉冲实现的。
Formation of electron vortices and momentum spirals in photodetachment of the H$^-$ anion driven by isolated ultrashort laser pulses of circular polarization or by pairs of such pulses (of either corotating or counterrotating polarizations) are analyzed under the scope of the strong-field approximation. It is demonstrated that the carrier-envelope phase (CEP) and helicity of each individual pulse can be used to actively manipulate and control the vortical pattern in the probability amplitude of photodetachment. Specifically, the two-dimensional mappings of probability amplitude can be rotated in the polarization plane with changing the CEP of the driving pulse (or two corotating pulses); thus, offering a new tool of field characterization. Furthermore, it is shown that the formation of spirals or annihilation of vortices relates directly to the time-reversal symmetry of the laser field, which is realized by a pair of pulses with opposite helicities and CEPs.
