2021/05/31 by Huiying Huang, Diana Csontosová, Santanu Manna +4
Materials Science · Physics and Astronomy · #Coulomb #Dipole #Electric field #Exciton #Polarizability #Quantum Dots Synthesis And Properties #Quantum and electron transport phenomena #Quantum dot #Quantum-confined Stark effect #Semiconductor Quantum Structures and Devices #Stark effect #cond-mat.mes-hall #cond-mat.mtrl-sci #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevb.104.165401
published as Phys. Rev. B 104, 165401 (2021)
openalex created_date 2021/06/07 · openalex publication_date 2021/10/01 · arxiv created 2022/02/14 · arxiv updated 2022/02/15 · openalex updated_date 2026/08/05
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.