Non-dipole recollision-gated double ionization and observable effects
Non-dipole recollision-gated double ionization and observable effects
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DOI：
10.1088/1361-6455/aa90e9
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
A. Emmanouilidou;T. Meltzer;P. Corkum
中科院分区：
文献类型：
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作者：
A. Emmanouilidou;T. Meltzer;P. Corkum
利用三维半经典模型，我们研究了强驱动He在时间传播过程中的双电离。对于线性和轻微的椭圆偏振激光场，我们表明，激光和磁场结合作为一个门。这个门有利于更多的横向相对于电场的隧穿电子的初始动量，这是相反的激光场的传播方向。在没有非偶极效应的情况下，横向初始动量关于零对称。我们发现，这种不对称性的横向初始动量引起的不对称性在双电离观察。
Using a three-dimensional semiclassical model, we study double ionization for strongly driven He fully accounting for magnetic field effects during the propagation in time. For linearly and slightly elliptically polarized laser fields, we show that recollisions and the magnetic field combined act as a gate. This gate favors more transverse—with respect to the electric field—initial momenta of the tunneling electron that are opposite to the propagation direction of the laser field. In the absence of non-dipole effects, the transverse initial momentum is symmetric with respect to zero. We find that this asymmetry in the transverse initial momentum gives rise to an asymmetry in a double ionization observable.