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- Title
Transfer of vibrational coherence through incoherent energy transfer process in Förster limit.
- Authors
Mančal, Tomáš; Dostál, Jakub; Pšenčík, Jakub; Zigmantas, Donatas
- Abstract
We study transfer of coherent nuclear oscillations between an excitation energy donor and an acceptor in a simple dimeric electronic system coupled to an unstructured thermodynamic bath and some pronounced vibrational intramolecular mode. Our focus is on the nonlinear optical response of such a system, i.e., we study both excited state energy transfer and the compensation of the so-called ground-state bleach signal. The response function formalism enables us to investigate a heterodimer with monomers coupled strongly to the bath and by a weak resonance coupling to each other (Förster rate limit). Our work is motivated by recent observation of various vibrational signatures in two-dimensional coherent spectra of energy-transferring systems including large structures with a fast energy diffusion. We find that the vibrational coherence can be transferred from donor to acceptor molecules provided the transfer rate is sufficiently fast. The ground-state bleach signal of the acceptor molecules does not show any oscillatory signatures, and oscillations in ground-state bleaching signal of the donor prevail with the amplitude, which is not decreasing with the relaxation rate.
- Subjects
COHERENCE (Optics); FLUORESCENCE resonance energy transfer; ELECTRON donor-acceptor complexes; THERMODYNAMICS; EXCITED state energies; ELECTRONIC systems; MONOMERS
- Publication
Canadian Journal of Chemistry, 2014, Vol 92, Issue 2, p135
- ISSN
0008-4042
- Publication type
Article
- DOI
10.1139/cjc-2013-0351