Charged excitons and biexcitons in laterally coupled InGaAs quantum dots

Abstract

We present results of atomistic empirical pseudopotential calculations and configuration interaction for excitons, positive and negative trions (X\pm), positive and negative quartons (X2\pm) and biexcitons. The structure investigated are laterally aligned InGaAs quantum dot molecules embedded in GaAs under a lateral electric field. The rather simple energetic of excitons becomes more complex in the case of charged quasiparticles but remains tractable. The negative trion spectrum shows four anticrossings in the presently available range of fields while the positive trion shows two. The magnitude of the anticrossings reveals many-body effects in the carrier tunneling process that should be experimentally accessible.

9 Pages, 9 Figures, 3 Pages. High quality figures at http://www.fkf.mpg.de/bester/publications.html

References in corpus (10)

• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Ultrafast optical rotations of electron spins in quantum dots
• Engineering electron and hole tunneling with asymmetric InAs quantum dot molecules
• Fast optical preparation, control and read-out of single quantum dot spin
• Theory of excitonic spectra and entanglement engineering in dot molecules
• Fast spin rotations by optically controlled geometric phases in a quantum dot
• Hole Spin Mixing in InAs Quantum Dot Molecules
• Singlet-triplet splitting, correlation and entanglement of two electrons in quantum dot molecules
• Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields
• Influence of the charge carrier tunneling processes on the recombination dynamics in single lateral quantum dot molecules

Cited by in corpus (10)

• Optical properties in a two-dimensional quantum ring: Confinement potential and Aharonov-Bohm effect
• Nonlinear optical properties in a quantum well with the hyperbolic confinement potential
• Charge control in laterally coupled double quantum dots
• Localized charge bifurcation in the coupled quantum dots
• Spectroscopic signatures of many-body interactions and delocalized states in self-assembled lateral quantum dot molecules
• Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
• Emission spectrum of quasi-resonant laterally coupled quantum dots
• Towards Tripartite Hybrid Entanglement in Quantum Dot Molecules
• Trions and biexcitons in a nanowire
• Non-stationary effects in the system of coupled quantum dots influenced by the Coulomb correlations