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.
Domaines
Physique [physics]
Fichier principal
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
| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
|---|