Stark effect on the exciton complexes of individual quantum dots

TL;DR

This paper theoretically investigates the Stark effect on exciton complexes in individual quantum dots, analyzing how electric fields influence their spectral properties and emission rates, with potential applications in quantum photonics.

Contribution

It provides a detailed theoretical analysis of how electric fields affect exciton complexes in quantum dots, including shifts in transition energies and emission control methods.

Findings

Redshifts and blueshifts observed in exciton, trions, and biexciton spectra.

Electric field strength and direction significantly influence spectral shifts.

Stark effect can be used to manipulate emission rates of quantum dots.

Abstract

The emission spectrum of exciton complexes formed in individual self-assembled quantum dots (QDs) embedded into a p-n junction is theoretically studied using an effective mass model. We calculate the particle Coulomb interactions, eletron-hole overlaps and transition energies of exciton complexes for the different strength and direction of electric field. Both redshifts and blueshifts are observed in exciton, trions and biexciton. The Stark effect may be applied to manipulate the spontaneous emission rate of individual QDs embedded in microcavities.