Electric field induced tuning of electronic correlation in weakly confining quantum dots

Abstract

We conduct a combined experimental and theoretical study of the quantum-confined Stark effect in GaAs/AlGaAs quantum dots obtained with the local droplet etching method. In the experiment, we probe the permanent electric dipole and polarizability of neutral and positively charged excitons weakly confined in GaAs quantum dots by measuring their light emission under the influence of a variable electric field applied along the growth direction. Calculations based on the configuration-interaction method show excellent quantitative agreement with the experiment and allow us to elucidate the role of Coulomb interactions among the confined particles and -- even more importantly -- of electronic correlation effects on the Stark shifts. Moreover, we show how the electric field alters properties such as built-in dipole, binding energy, and heavy-light hole mixing of multiparticle complexes in weakly confining systems, underlining the deficiencies of commonly used models for the quantum-confined Stark effect.

References in corpus (10)

• A bright and fast source of coherent single photons
• A solid-state entangled photon pair source with high brightness and indistinguishability
• Droplet Epitaxy of Semiconductor Nanostructures for Quantum Photonic Devices
• Low-Noise GaAs Quantum Dots for Quantum Photonics
• Quantum cryptography with highly entangled photons from semiconductor quantum dots
• Quantum Interface of an Electron and a Nuclear Ensemble
• Resonance fluorescence of GaAs quantum dots with near-unity photon indistinguishability
• Non post-selected indistinguishable single photons generated by a quantum dot under resonant excitation
• Theory of magneto-optical properties of neutral and charged excitons in GaAs/AlGaAs quantum dots
• Polarization anisotropy of the emission from type-II quantum dots

Cited by in corpus (4)

• GaAs quantum dots under quasi-uniaxial stress: experiment and theory
• Excitonic fine structure of epitaxial Cd(Se,Te) on ZnTe type-II quantum dots
• Coulomb correlated multi-particle states of weakly confining GaAs quantum dots
• Combined tight-binding and configuration interaction study of unfolded electronic structure of G-color center in Si