论文标题
手性分子的Attsond分辨光电离
Attosecond-resolved photoionization of chiral molecules
论文作者
论文摘要
已经研究了两个世纪的手性光 - 物质相互作用，从而发现了许多用于区分对映异构体的手势过程。尽管大多数手势效应是由绑定电子的响应引起的，但光电离会产生更强的手性信号，这些信号表现为光电子沿光繁殖轴的角度分布的不对称性。在这里，我们实现了一个自我引用的ATTOSENT光电部干涉仪，以测量通过通过圆形极化激光脉冲将樟脑光电离时向前和后向电子波袋的时间分布。我们发现向前和向后弹出的电子之间有一个延迟，这取决于射血角并达到24个attoseconds。通过自动化状态发射的电子波袋的不对称时间形状进一步揭示了强烈相关的电子动力学的手性特征。
Chiral light-matter interactions have been investigated for two centuries, leading to the discovery of many chiroptical processes used for discrimination of enantiomers. Whereas most chiroptical effects result from a response of bound electrons, photoionization can produce much stronger chiral signals that manifest as asymmetries in the angular distribution of the photoelectrons along the light propagation axis. Here we implement a self-referenced attosecond photoelectron interferometry to measure the temporal profile of the forward and backward electron wavepackets emitted upon photoionization of camphor by circularly polarized laser pulses. We found a delay between electrons ejected forward and backward, which depends on the ejection angle and reaches 24 attoseconds. The asymmetric temporal shape of electron wavepackets emitted through an autoionizing state further reveals the chiral character of strongly-correlated electronic dynamics.
