Signatures of light-induced nonadiabaticity in the field-dressed vibronic spectrum of formaldehyde
Nonadiabatic coupling is absent between the electronic ground X and first excited (singlet) A states of formaldehyde. As laser fields can induce conical intersections between these two electronic states, formaldehyde is particularly suitable for investigating light-induced nonadiabaticity in a polya...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
24 March 2021
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| In: |
The journal of chemical physics
Year: 2021, Volume: 154, Issue: 12, Pages: 1-13 |
| ISSN: | 1089-7690 |
| DOI: | 10.1063/5.0045069 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1063/5.0045069 Verlag, lizenzpflichtig, Volltext: https://aip.scitation.org/doi/10.1063/5.0045069 
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| Author Notes: | Csaba Fábri, Gábor J. Halász, Lorenz S. Cederbaum, and Ágnes Vibók |
| Summary: | Nonadiabatic coupling is absent between the electronic ground X and first excited (singlet) A states of formaldehyde. As laser fields can induce conical intersections between these two electronic states, formaldehyde is particularly suitable for investigating light-induced nonadiabaticity in a polyatomic molecule. The present work reports on the spectrum induced by light—the so-called field-dressed spectrum—probed by a weak laser pulse. A full-dimensional ab initio approach in the framework of Floquet-state representation is applied. The low-energy spectrum, which without the dressing field would correspond to an infrared vibrational spectrum in the X-state, and the high-energy spectrum, which without the dressing field would correspond to the X → A spectrum, are computed and analyzed. The spectra are shown to be highly sensitive to the frequency of the dressing light allowing one to isolate different nonadiabatic phenomena. |
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| Item Description: | Gesehen am 27.04.2021 |
| Physical Description: | Online Resource |
| ISSN: | 1089-7690 |
| DOI: | 10.1063/5.0045069 |