Abstract
In the present study, the transfer of energy between a pair of donor–acceptor molecules as point-like dipoles located nearby a plasmonic nanoparticle is investigated, in which an electric point charge is placed at a distance rq from the center of metallic nanoparticle or nanoshell. It is shown that the process of energy transfer between pairs of molecules is affected when an external point charge is placed next to the plasmonic nanoparticle. In addition to the contribution of the dipolar plasmon mode, the contribution of the quadrupolar and octupolar modes is taken into account because these plasmonic modes are more sensitive to changes; therefore, they can be used in sensing applications. The effect of the physical parameters of the system, such as the magnitude of the electric charge, the distance of the electric charge, the dielectric constant of the host medium, the distance of the donor molecule, and type of metal nanoparticle on the intermolecular energy transfer, is studied. However, we calculate and demonstrate that it is possible to use an electric point charge next to a hybrid plasmonic nanoparticle-molecular system to enhance the energy transfer from a donor molecule to an acceptor molecule.
Published Version
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