Abstract
We present an experimental investigation of the magneto optical properties of neutral exciton, neutral biexciton and charged exciton confined in self-assembled GaAs/Al0.3Ga0.7As strain free quantum dots grown by droplet epitaxy. We measured the diamagnetic shift γ for several quantum dots spanning an interval of 200 meV of the exciton emission energy. The dependence of γ on quantum dot size and shape is discussed together with a comparison with Stranski Krastanov and fluctuation induced GaAs quantum dots, as well as with quantum well case.
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