Kondo excitons in self-assembled quantum dots

Abstract

We describe novel excitons in quantum dots by allowing for an interaction with a Fermi sea of electrons. We argue that these excitons can be realized very simply with self-assembled quantum dots, using the wetting layer as host for the Fermi sea. We show that a tunnel hybridization of a charged exciton with the Fermi sea leads to two striking effects in the optical spectra. First, the photoluminescence lines become strongly dependent on the vertical bias. Secondly, if the exciton spin is nonzero, the Kondo effect leads to peculiar photoluminescence line shapes with a line width determined by the Kondo temperature.

9 pages, 4 figures

References in corpus (8)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• The Kondo Effect in the Unitary Limit
• Anomalous Kondo-effect in Quantum Dot at non-zero bias
• How long does it take for the Kondo effect to develop?
• Optical excitations of a self assembled artificial ion
• Spin correlations in nonlinear optical response: Light-induced Kondo effect
• Many-particle resonances in excited states of semiconductor quantum dots

Cited by in corpus (8)

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• Coulomb blockade in an atomically thin quantum dot coupled to a tunable Fermi reservoir
• Spin-Forster transfer in optically excited quantum dots
• Absorption and Emission in quantum dots: Fermi surface effects of Anderson excitons
• Observation of coupling between zero- and two-dimensional semiconductor systems based on anomalous diamagnetic effects
• From the artificial atom to the Kondo-Anderson model: orientation dependent magneto-photoluminescence of charged excitons in InAs quantum dots
• Shedding light on non-equilibrium dynamics of a spin coupled to fermionic reservoir
• Quantum quench of Kondo correlations in optical absorption