Vibronic dynamics resolved by global and target analysis of ultrafast transient absorption spectra

0563557 - FZÚ 2023 RIV US eng J - Journal Article
van Stokkum, I.H.M. - Kloz, Miroslav - Polli, D. - Viola, D. - Weissenborn, J. - Peerbooms, E. - Cerullo, G. - Kennis, J.T.M.
Vibronic dynamics resolved by global and target analysis of ultrafast transient absorption spectra.
Journal of Chemical Physics. Roč. 155, č. 11 (2021), č. článku 114113. ISSN 0021-9606. E-ISSN 1089-7690
EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE; European Commission(XE) 871124 - LASERLAB-EUROPE
Institutional support: RVO:68378271
Keywords : stimulated raman-spectroscopy * excited-state * vibrational coherence * impulsive excitation
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 4.304, year: 2021
Method of publishing: Open access

We present a methodology that provides a complete parametric description of the time evolution of the electronically and vibrationally excited states as detected by ultrafast transient absorption (TA). Differently from previous approaches, which started fitting the data after ≈100 fs, no data are left out in our methodology, and the “coherent artifact” and the instrument response function are fully taken into account. In case studies, the method is applied to solvents, the dye Nile blue, and all-trans β-carotene in cyclohexane solution. The estimated Damped Oscillation Associated Spectra (DOAS) and phases express the most important vibrational frequencies present in the molecular system. By global fit alone of the experimental data, it is difficult to interpret in detail the underlying dynamics.
Permanent Link: https://hdl.handle.net/11104/0335577