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 (28)

• A bright and fast source of coherent single photons
• A solid-state entangled photon pair source with high brightness and indistinguishability
• Tunable Indistinguishable Photons From Remote Quantum Dots
• On-demand generation of background--free single photons from a solid-state source
• Droplet Epitaxy of Semiconductor Nanostructures for Quantum Photonic Devices
• Strain-Tunable GaAs Quantum dot: A Nearly Dephasing-Free Source of Entangled Photon Pairs on Demand
• Low-Noise GaAs Quantum Dots for Quantum Photonics
• Semiconductor devices for entangled photon pair generation: a review
• Entanglement swapping with photons generated on-demand by a quantum dot
• Quantum cryptography with highly entangled photons from semiconductor quantum dots
• Quantum Interface of an Electron and a Nuclear Ensemble
• Semiconductor quantum dots as an ideal source of polarization entangled photon pairs on-demand: a review
• Optical spectroscopy of single quantum dots at tunable positive, neutral and negative charge states
• Giant Stark effect in the emission of single semiconductor quantum dots
• Correlation versus mean-field contributions to excitons, multi-excitons, and charging energies in semiconductor quantum dots
• Resonance fluorescence of GaAs quantum dots with near-unity photon indistinguishability
• Entanglement Swapping with Semiconductor-generated Photons
• Size dependent line broadening in the emission spectra of single GaAs quantum dots: Impact of surface charges on spectral diffusion
• Excitonic structure and pumping power dependent emission blue-shift of type-II quantum dots
• Single-Particle-Picture Breakdown in laterally weakly confining GaAs Quantum Dots
• 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
• Electronic states of (InGa)(AsSb)/GaAs/GaP quantum dots
• Polarization anisotropy of the emission from type-II quantum dots
• Inversion of the exciton built-in dipole moment in In(Ga)As quantum dots via nonlinear piezoelectric effect
• Effect of second order piezoelectricity on excitonic structure of stress-tuned InGaAs/GaAs quantum dots
• Correlations between Optical Properties and Voronoi-Cell Area of Quantum Dots
• Magneto-spectroscopy of excited states in charge-tunable GaAs/AlGaAs [111] 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