Screening of the quantum dot Förster coupling at small distances

Abstract

We study the near-field energy transfer rates between two finite size quantum dot disks, generalizing the result of Förster coupling between two point dipoles. In particular, we derive analytical results for the envelope of the electronic wavefunction for model potentials at the boundaries of quantum dot disks and demonstrate how the Förster interaction is screened as the size of the dots becomes comparable to the dot-dot separation.

Coupling Perovskite Quantum Dot Pairs in Solution using a Nanoplasmonic Assembly

“…There could also be effects beyond a dipole approximation, which can be captures by doing a spatial integration with respect to the inter-PQD exciton wave functions and the photon Green function propagator. 65 We have carried out such a calculation using 6D Monte Carlo integration and found the dipole approximation to be excellent, within 5% for QD cubes that have a gap separation of 1 nm. This calculation used the ground state exciton wave function, and we used a similar integration techniques to compute C, which enhances the oscillator strength.…”