论文标题
对齐双原子分子的高阶谐波产生中的量子路径干扰
Quantum path interferences in high-order harmonic generation from aligned diatomic molecules
论文作者
论文摘要
在强激光驱动的比对分子中的电子量子路径干扰及其对分子比对的依赖性是强场分子物理学中的基本开放问题。在这里，我们演示了一种方法，该方法可直接访问对这些干扰过程的观察。该方法基于时间门控 - 微观镜技术与用于对齐分子并产生高阶谐波的泵探针布置的组合。通过在空间解决由短而长的电子量子路径发出的谐波的时空重叠产生的干扰模式，我们成功地测量了它们的相位差异并披露了它们对分子比对的依赖。这些发现构成了了解强场分子物理学的重要步骤，并且在不使用辅助原子参考的情况下开发了光谱法的发展。
Electron quantum path interferences in strongly laser-driven aligned molecules and their dependence on the molecular alignment is an essential open problem in strong-field molecular physics. Here, we demonstrate an approach which provides direct access to the observation of these interference processes. The approach is based on the combination of the time-gated-ion-microscopy technique with a pump-probe arrangement used to align the molecules and generate high-order harmonics. By spatially resolving the interference pattern produced by the spatiotemporal overlap of the harmonics emitted by the short and long electron quantum paths, we have succeeded in measuring in situ their phase difference and disclose their dependence on molecular alignment. The findings constitute a vital step towards an understanding of strong-field molecular physics and the development of attosecond spectroscopy approaches without the use of auxiliary atomic references.
