Phonon-assisted excitation transfer in quantum dot molecules

TL;DR

This paper develops a quantum-kinetic model for phonon-assisted excitation transfer in quantum dot molecules, revealing rapid decay processes on picosecond timescales influenced by phonon interactions.

Contribution

It introduces a novel quantum-kinetic framework to describe phonon-assisted transfer in coupled quantum dots, highlighting the decay dynamics and transfer timescales.

Findings

Exciton state decays via Rabi rotation and exponential decay.

Transfer occurs on a picosecond timescale for moderately spaced dots.

The model captures phonon effects in quantum dot molecules.

Abstract

We derive a quantum-kinetic description of phonon-assisted F{\"o}rster transfer between two coupled quantum dots (a quantum dot molecule). We show that the exciton state decays to the ground state of the QDM via a combination of the Rabi rotation and exponential decay. For moderately spaced dots this process takes place on a picosecond time scale.