Power transfer due to Kerr nonlinearity in plasmonic nanohybrids

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We have studied the energy transfer using Kerr nonlinearity for nanohybrids made of an ensemble of interacting quantum dots and metallic nanoshells. The energy transfer in quantum dots has been calculated by using the quantum density matrix method in the dipole-dipole coupling between quantum dots. We showed that the power transfer occurs from the metallic nanoshell to the quantum dot by four processes. In the first process, three probe photons are transferred to the quantum dot. In the second process, two probe photons and one polariton from the metallic nanoshell are transferred to the quantum dot. Similarly, in the third process, one probe photon and two polaritons from the metallic nanoshell are transferred to the quantum dot. Finally, three polaritons from the metallic nanoshell are transferred to the quantum dot. We found an enhancement in the energy transfer in the quantum dot due to the last three processes. We have also predicted that the power spectrum peak would split into two peaks due to the dipole-dipole coupling. The present findings can be used to fabricate nano-power devices for nanotechnology and nanomedical applications.