Strong-field dynamics of molecules: electron-nuclear correlation (Prof. Jian Wu)

Here, we experimentally reveal the correlated electron-nuclear dynamics by measuring the electrons and nuclear fragments ejected from a single molecule in coincidence. Our experimental results show that the electron and nuclei in a molecule share the absorbed multiphoton energy in a correlative manner [1,2]. The molecule as a whole absorbs the photon energy. The electron-nuclear energy sharing assisted by the rescattering lead to the observation of long-term predicted photon-energy spaced above threshold dissociation spectrum of breaking molecules [3], which is the interference of the periodically emitted electron-nuclear wave packet in the oscillating strong laser fields. Interestingly, for molecules in strong laser fields, a liberated electron can be recaptured by the ejected ionic fragments, leading to the formation of the excited Rydberg fragments. We real-time observe and further directionally control the dissociative frustrated double ionization of hydrogen molecules [4]. The frustrated double ionization of molecules can be generally understood in a multiphoton route by considering the correlated dynamics of electrons and nuclei of the molecule [5].

After the talk, Prof. Guoyue Shi will present a brief overview of ECNU, its history and main disciplines as well as the HR policies. He will also discuss opportunities to join ECNU for PhD studies or as postdoc.