We analytically derive transfer probabilities and efficiencies for an
artificial light-harvesting photosynthetic system, which consists of a ring
coupled to a central acceptor. For an incident photon pair, we find
near-perfect single excitation transfer efficiency with negligible double
excitation transfer in the weak coupling regime. In the strong coupling regime,
single excitation transfer efficiency was greater than 90%, while the double
excitation efficiency was approximately 50%. We have found that the three main
factors which determine high transfer efficiencies are large acceptor
probabilities, long acceptor decay times, and strong photon-ring coupling. A
possible implementation of the theoretical framework to bio-inspired solar
energy devices is also discussed.

Cet article explore les excursions dans le temps et leurs implications.

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