Spectroscopic signatures of many-body interactions and delocalized states in self-assembled lateral quantum dot molecules

Abstract

Lateral quantum dot molecules consist of at least two closely-spaced InGaAs quantum dots arranged such that the axis connecting the quantum dots is perpendicular to the growth direction. These quantum dot complexes are called molecules because the small spacing between the quantum dots is expected to lead to the formation of molecular-like delocalized states. We present optical spectroscopy of ensembles and individual lateral quantum dot molecules as a function of electric fields applied along the growth direction. The results allow us to characterize the energy level structure of lateral quantum dot molecules and the spectral signatures of both charging and many-body interactions. We present experimental evidence for the existence of molecular-like delocalized states for electrons in the first excited energy shell.

9 pages, 5 figures

References in corpus (8)

• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Ultrafast optical control of entanglement between two quantum dot spins
• Electrically tunable g-factors in quantum dot molecular spin states
• Hole Spin Mixing in InAs Quantum Dot Molecules
• Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields
• Charge control in laterally coupled double quantum dots
• Charged excitons and biexcitons in laterally coupled InGaAs quantum dots
• Influence of the charge carrier tunneling processes on the recombination dynamics in single lateral quantum dot molecules

Cited by in corpus (3)

• Coulomb interaction signatures in self-assembled lateral quantum dot molecules
• Design of a 4-electrode optical device for application of vector electric fields to self-assembled quantum dot complexes
• Charging of a Single InAs QD with Electrically-Injected Holes using a Lateral Electric Field