抄録
Offer Organization: Japan Society for the Promotion of Science, System Name: Grants-in-Aid for Scientific Research, Category: Grant-in-Aid for Scientific Research (A), Fund Type: -, Overall Grant Amount: - (direct: 31600000, indirect: 9480000)
We could reveal ultrafast dynamics of simple molecules and succeed in controlling the reaction pathways using a pair of attosecond pulse train (APT). First, we discovered the `~1-fs settling time needed for creating a vibrational wavepacket in H2+ molecule. Two-dimensional spectrogram, which was a record of the kinetic energy release (KER) of H+ fragment with scanning delay between two APTs, was analyzed by the frequency-resolved optical gating technique. We found the initial delays between the vibrational wavefunctions forming the wavepacket, which can be interpreted as the settling time (Nat. Commun. 6:8197 (2015).). Second, we found an attosecond electronic wavepacket generated in N2 and N2+ molecules (Sci. Adv. 1, e1500356 (2015).). Third, we controlled the dissociation pathways of H2+ by utilizing the ultrafast vibrational motion. Only 8-fs delay difference of the control APT switched the dissociation pathway of 2pσu state to that of 2pπu state (Nat. Commun. 7:12835(2016)).