Pair and Many-Body Resonance Energy Transfer: Molecular QED Theory

MPSD Seminar

  • Date: Mar 11, 2020
  • Time: 11:00 - 12:30
  • Speaker: CANCELLED - Akbar Salam
  • Location: CFEL (Bldg. 99)
  • Room: Seminar Room IV, O1.111
  • Host: Angel Rubio, Michael Ruggenthaler
  • Contact: office.rubio@mpsd.mpg.de
CANCELLATION - Please note that due to the spread of the coronavirus disease (COVID-19) this seminar has been cancelled.

A noteworthy success of the theory of molecular quantum electrodynamics (QED) [1,2] is its ability to rigorously treat both radiation-matter and inter-particle interactions. An example of the latter that is to be presented in this seminar is resonance energy transfer (RET) [3] between an excited donor species and a ground state acceptor molecule separated by a distance R. Migration of energy occurs via the propagation of a single virtual photon. A diagrammatic perturbation theory calculation of the Fermi golden rule exchange rate for oriented and isotropic systems is reviewed first.

It is shown how R-6 radiationless (Förster) and R-2 radiative transfer emerges from the general result as near- and far-zone asymptotic limits, respectively. Theory is extended by including the effect that one or two additional passive, polarizable molecules have in relaying energy between donor and acceptor [4-7]. Insight is gained into exchange of energy taking place in a medium by comparing the present formulation of a many-body theory that explicitly accounts for direct and indirect transfer mechanisms with macroscopic treatments of an environment.

[1] A. Salam, Molecular Quantum Electrodynamics, John Wiley & Sons, Inc., 2010.

[2] D. L. Andrews, G. A. Jones, A. Salam and R. G. Woolley, J. Chem. Phys. 148, 040901 (2018).

[3] A. Salam, Atoms 6, 56 (2018).

[4] A. Salam, J. Chem. Phys. 136, 014509 (2012).

[5] A. Salam, J. Phys. Chem. A 123, 2853 (2019).

[6] A. Salam, J. Chem. Phys. 151, 244119 (2019).

[7] J. S. Ford, A. Salam and G. A. Jones, J. Phys. Chem. Lett. 10, 5654 (2019).

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