论文标题
电离引起的对称顶部分子的持久方向
Ionization-induced Long-lasting Orientation of Symmetric-top Molecules
论文作者
论文摘要
从理论上讲，我们考虑了通过两色激光脉冲电离的对称顶部分子的无场长效率的现象。各向异性电离产生幸存的中性分子的显着持久方向。方向程度随脉冲强度和违反直觉的旋转温度而增加。通过使用多个延迟的两色脉冲，可以进一步增强方向。甚至可以通过谐波产生或基于库仑探索的方法来探测持久的方向。该效果可能使研究过程中的弛豫过程能够研究，并且可能对分子引导和捕获不均匀域有用。
We theoretically consider the phenomenon of field-free long-lasting orientation of symmetric-top molecules ionized by two-color laser pulses. The anisotropic ionization produces a significant long-lasting orientation of the surviving neutral molecules. The degree of orientation increases with both the pulse intensity and, counterintuitively, with the rotational temperature. The orientation may be enhanced even further by using multiple delayed two-color pulses. The long-lasting orientation may be probed by even harmonic generation or by Coulomb-explosion-based methods. The effect may enable the study of relaxation processes in dense molecular gases, and may be useful for molecular guiding and trapping by inhomogeneous fields.
