Charge control in laterally coupled double quantum dots

Abstract

We investigate the electronic and optical properties of InAs double quantum dots grown on GaAs (001) and laterally aligned along the [110] crystal direction. The emission spectrum has been investigated as a function of a lateral electric field applied along the quantum dot pair mutual axis. The number of confined electrons can be controlled with the external bias leading to sharp energy shifts which we use to identify the emission from neutral and charged exciton complexes. Quantum tunnelling of these electrons is proposed to explain the reversed ordering of the trion emission lines as compared to that of excitons in our system.

4 pages, 4 figures submitted to PRB Rapid Comm

References in corpus (10)

• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Ultrafast optical control of entanglement between two quantum dot spins
• Manipulating exciton fine-structure in quantum dots with a lateral electric field
• Enhanced sequential carrier capture into individual quantum dots and quantum posts controlled by surface acoustic waves
• Photoluminescence Spectroscopy of the Molecular Biexciton in Vertically Stacked Quantum Dot Pairs
• Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields
• Direct observation of dynamic surface acoustic wave controlled carrier injection into single quantum posts using phase-resolved optical spectroscopy
• Charged excitons and biexcitons in laterally coupled InGaAs quantum dots
• Photoluminescence spectroscopy of trions in quantum dots: a theoretical description
• Optical Spin Initialization and Non-Destructive Measurement in a Quantum Dot Molecule

Cited by in corpus (10)

• Tunneling transport through multi-electrons states in coupled quantum dots with Coulomb correlations
• Localized charge bifurcation in the coupled quantum dots
• Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
• Spectroscopic signatures of many-body interactions and delocalized states in self-assembled lateral quantum dot molecules
• Coulomb interaction signatures in self-assembled lateral quantum dot molecules
• Delocalization of electrons by cavity photons in transport through a quantum dot molecule
• Emission spectrum of quasi-resonant laterally coupled quantum dots
• Design of a 4-electrode optical device for application of vector electric fields to self-assembled quantum dot complexes
• External field induced switching of tunneling current in the coupled quantum dots
• Non-stationary effects in the system of coupled quantum dots influenced by the Coulomb correlations