Laboratoire de Chimie Théorique, Faculté des Sciences, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada.
J Chem Phys. 2013 Apr 7;138(13):134316. doi: 10.1063/1.4799267.
Molecular photoelectron angular distributions (MPADs) by intense (I0 ≥ 10(14) W/cm(2)) circularly polarized ultrashort, few cycle (attosecond) ultraviolet laser pulses are presented from numerical solutions of time dependent Schrödinger equations. For the aligned molecular ion H2(+), the MPADs exhibit rotations with respect to the polarization and molecular symmetry axes which are determined by the symmetry of the initial electronics states. It is also found that the rotation angle of MPADs is insensitive to the pulse intensity. We attribute these effects to the asymmetry between the parallel and perpendicular (to the molecular axis) polarization photoionization. Influence of the molecular alignment and ionizing pulse ellipticity on the rotation of MPADs is also shown to allow control of the nonsymmetric ionization.
强（I0≥10（14）W/cm（2））圆偏振超短、少周期（阿秒）紫外激光脉冲的分子光电离角分布（MPADs）由含时薛定谔方程的数值解给出。对于取向的分子离子 H2（+），MPADs 相对于偏振和分子对称轴发生旋转，这由初始电子态的对称性决定。还发现 MPADs 的旋转角度对脉冲强度不敏感。我们将这些效应归因于平行和垂直（分子轴）偏振光电离之间的不对称性。还显示了分子取向和电离脉冲椭圆度对 MPADs 旋转的影响，这允许控制非对称电离。
