Non-linear exciton spin-splitting in single InAs/GaAs self-assembled quantum structures in ultrahigh magnetic fields

Abstract

We report on the magnetic field dispersion of the exciton spin-splitting and diamagnetic shift in single InAs/GaAs quantum dots (QDs) and dot molecules (QDMs) up to $B$ = 28 T. Only for systems with strong geometric confinement, the dispersions can be well described by simple field dependencies, while for dots with weaker confinement considerable deviations are observed: most importantly, in the high field limit the spin-splitting shows a non-linear dependence on $B$, clearly indicating light hole admixtures to the valence band ground state.

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Cited by in corpus (6)

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• 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
• Longitudinal wave function control in single quantum dots with an applied magnetic field
• Impact of ex-situ rapid thermal annealing on the magneto-optical properties and the oscillator strength of In(Ga)As quantum dots
• Optical readout of charge and spin in a self-assembled quantum dot in a strong magnetic field