Imaging the Renner-Teller Effect using Laser-Induced Electron Diffraction
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 B̃1B2 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 B̃1B2 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.
K. Amini et al., "Imaging the Renner-Teller Effect using Laser-Induced Electron Diffraction," Proceedings of the National Academy of Sciences of the United States of America, vol. 116, no. 17, pp. 8173-8177, National Academy of Sciences, Apr 2019.
The definitive version is available at https://doi.org/10.1073/pnas.1817465116
Keywords and Phrases
Attosecond wave packet; Electron diffraction; Laser-induced electron diffraction; Nonadiabatic dynamics; Structural dynamics
International Standard Serial Number (ISSN)
Article - Journal
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