Emission properties and temporal coherence of the dark exciton confined in a GaAs / Al x Ga 1 − x As quantum dot - Croissance et propriétés de systèmes hybrides en couches minces Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2021

Emission properties and temporal coherence of the dark exciton confined in a GaAs / Al x Ga 1 − x As quantum dot

Résumé

We report measurements of the radiative lifetimes and coherence times of the dark and bright excitons in an asymmetric GaAs/AlGaAs quantum dot. The dots, fabricated by partial infilling of asymmetric in situ etched nanoholes, have low symmetry, which leads to significant dark-bright mixing as demonstrated by dark-bright anticrossing in magnetophotoluminescence spectra. Using an orthogonal excitation-detection waveguiding geometry and quasiresonant excitation, we compare the coherence properties, measured by Michelson interferometry, of the dark and bright exciton from the same dot in the absence of an external magnetic field.
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Germanis et al. - 2021 - PHYSICAL REVIEW B 104 , 115306 ( 2021 ) Emission properties and temporal coherence of the dark exciton confin.pdf (7.69 Mo) Télécharger le fichier
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Dates et versions

hal-03347205 , version 1 (17-09-2021)

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S. Germanis, P. Atkinson, R. Hostein, S. Majrab, F. Margaillan, et al.. Emission properties and temporal coherence of the dark exciton confined in a GaAs / Al x Ga 1 − x As quantum dot. Physical Review B, 2021, 104 (11), ⟨10.1103/PhysRevB.104.115306⟩. ⟨hal-03347205⟩
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