论文标题
分子氮的相位分辨率近阈值光电离分子氮
Phase-resolved attosecond near-threshold photoionization of molecular nitrogen
论文作者
论文摘要
我们将氮分子与弱红外场一起使用氮分子与极端紫外线脉冲。我们测量离子不同状态的两色两光子离子化过渡（分子相）的相。我们观察到在电离通道中产生的电子的0.76 $π$移位，导致x $^2σ_g^+$，$ v'= 1 $和$ v'= 2 $状态。我们将这种相位转移与连续体中复杂共振的存在相关联。通过提供高光谱和时间分辨率，这种一般方法可以访问极短的生活状态的演变，否则几乎无法访问。
We photoionize nitrogen molecules with a train of extreme ultraviolet attosecond pulses together with a weak infrared field. We measure the phase of the two-color two-photon ionization transition (molecular phase) for different states of the ion. We observe a 0.76 $π$ shift for the electrons produced in the ionization channels leading to the X$^2 Σ_g^+$, $v'=1$ and $v'=2$ states. We relate this phase shift to the presence of a complex resonance in the continuum. By providing both a high spectral and temporal resolution, this general approach gives access to the evolution of extremely short lived states, which is hardly accessible otherwise.
