Control of the Exciton Transfer in Quantum Dots by the Stark Effect

TL;DR

This paper presents a theoretical study on controlling exciton energy transfer between quantum dots using the Stark effect, highlighting how electric fields influence transfer efficiency and dynamics.

Contribution

It introduces a model Hamiltonian that incorporates laser pulses, Coulomb interaction, Stark effect, and relaxation, providing new insights into exciton transfer control in quantum dots.

Findings

Energy transfer efficiency varies with excitation conditions.

Electric field-induced level shifts enable control of exciton transfer.

Theoretical model predicts optimal conditions for transfer control.

Abstract

Resonant transfer of energy between excited states in a system of two semiconductor quantum dots is studied theoretically. The model Hamiltonian has been formulated, which allowed describe the impact on the dynamics of the resonant laser pulse, the Coulomb interaction, the static Stark effect, and the relaxation of the exciton states. Examples of calculations for efficiency of the energy transfer under different excitation conditions are presented. The control of the process by the level shift in a constant electric field is demonstrated.