| Literature DB >> 30952783 |
Kasra Amini1,2, Michele Sclafani1, Tobias Steinle1, Anh-Thu Le3, Aurelien Sanchez1, Carolin Müller4, Johannes Steinmetzer4, Lun Yue4, José Ramón Martínez Saavedra1, Michaël Hemmer1, Maciej Lewenstein1,5, Robert Moshammer6, Thomas Pfeifer6, Michael G Pullen1, Joachim Ullrich6,7, Benjamin Wolter1, Robert Moszynski2, F Javier García de Abajo1,5, C D Lin3, Stefanie Gräfe4,8, Jens Biegert9,5.
Abstract
Structural information on electronically excited neutral molecules can be indirectly retrieved, largely through pump-probe and rotational spectroscopy measurements with the aid of calculations. Here, we demonstrate the direct structural retrieval of neutral carbonyl disulfide (CS2) in the [Formula: see text] excited electronic state using laser-induced electron diffraction (LIED). We unambiguously identify the ultrafast symmetric stretching and bending of the field-dressed neutral CS2 molecule with combined picometer and attosecond resolution using intrapulse pump-probe excitation and measurement. We invoke the Renner-Teller effect to populate the [Formula: see text] excited state in neutral CS2, leading to bending and stretching of the molecule. Our results demonstrate the sensitivity of LIED in retrieving the geometric structure of CS2, which is known to appear as a two-center scatterer.Entities:
Keywords: attosecond wave packet; electron diffraction; laser-induced electron diffraction; nonadiabatic dynamics; structural dynamics
Year: 2019 PMID： 30952783 PMCID： PMC6486720 DOI： 10.1073/pnas.1817465116
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205