Attosecond control of spin polarization in electron-ion recollision driven by intense tailored fields
Attosecond control of spin polarization in electron-ion recollision driven by intense tailored fields
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DOI：
10.1088/1367-2630/aa732f
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发表时间：
2017-07-06
影响因子：
3.3
通讯作者：
Smirnova, Olga
中科院分区：
文献类型：
--
作者：
Ayuso, David;Jimenez-Galan, Alvaro;Smirnova, Olga
惰性气体原子在强圆偏振激光场和反向旋转的二次谐波驱动下的隧道电离产生与自旋极化离子核相关的自旋极化电子。重要的是，这种双色场可以将自旋极化电子带回母离子，使得自旋极化电子能够在自旋极化母离子上散射。在这里，我们展示了如何通过调节激光参数，如反向旋转场的相对强度，来控制自旋极化度作为电子能量和自旋时间的函数。自旋极化度控制的阿秒精度为阿秒控制和自旋分辨动力学光谱学打开了大门。
Tunnel ionization of noble gas atoms driven by a strong circularly polarized laser field in combination with a counter-rotating second harmonic generates spin-polarized electrons correlated to the spin-polarized ionic core. Crucially, such two-color field can bring the spin-polarized electrons back to the parent ion, enabling the scattering of the spin-polarized electron on the spin-polarized parent ion. Here we show how one can control the degree of spin polarization as a function of electron energy and recollision time by tuning the laser parameters, such as the relative intensities of the counter-rotating fields. The attosecond precision of the control over the degree of spin polarization opens the door for attosecond control and spectroscopy of spin-resolved dynamics.