Pump-probe high-harmonic spectroscopy could catch geometric phase effect around conical intersection in molecule: Study

A collaborative research team from Nanjing University of Science and Technology (NJUST) and East China Normal University (ECNU) has theoretically proposed that a pump-probe high-harmonic spectroscopy (HHS) driven by VUV-IR pulses can catch the geometric phase (GP) effect around the conical intersection (CI) and distinguish its quantitative behavior from the case of avoided crossing (AC). The results have been published in the journal Ultrafast Science.