Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G34: Ultrafast Dynamics and Control of Quantum Materials I
11:30 AM–2:06 PM,
Tuesday, March 15, 2022
Room: McCormick Place W-193A
Sponsoring
Unit:
DLS
Chair: Robert Kaindl, Arizona State University
Abstract: G34.00005 : Excited-state dynamics of porphyrin monomers by ultrafast multidimensional spectroscopy
12:18 PM–12:30 PM
Presenter:
Frank E Quintela
(University of Modena & Reggio Emilia)
Authors:
Frank E Quintela
(University of Modena & Reggio Emilia)
Filippo Troiani
(University of Modena & Reggio Emilia)
Elisa Molinari
(University of Modena & Reggio Emilia)
Vasilis Petropoulos
(Politecnico di Milano)
Mattia Russo
(Politecnico di Milano)
Margherita Maiuri
(Politecnico do Milano)
Giulio Cerullo
(Politecnico di Milano)
Pavel Rukin
(CNR Institute for Nanoscience)
Deborah Prezzi
(CNR Institute for Nanoscience)
Carlo A Rozzi
(CNR Institute for Nanoscience)
Gregory D Scholes
(Department of Chemistry, Princeton University)
Ana L Moore
(School of Molecular Sciences, Arizona State University)
Thomas Moore
(School of Molecular Sciences, Arizona State University)
Devens Gust
(School of Molecular Sciences, Arizona State University)
Here, we combine ultrafast multidimensional spectroscopies (pump-probe and two dimensional electronic spectroscopy) with ab initio (DFT and TDDFT) calculations to unveil the fundamental mechanisms at the heart of these processes. Based on the evidence of a sub-100fs dynamics within the Q-bands observed by the ultrafast experiments, we introduce an effective model within a density-matrix approach which well reproduces the data. The simulations allow us to unveil the role played in the internal conversion process by specific vibrational modes, to disentangle the intricate interplay between adiabatic and nonadiabatic couplings on the one hand, and the coherent and incoherent excitation relaxation on the other.
[1] L. Moretti et al., The Journal of Physical Chemistry Letters 11, 3443 (2020).
[2] N. K. Katturi et al., Optical Materials 107, 110041 (2020).
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