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- Spin relaxation of indirect excitons in asymmetric coupled quantum wells hal link

Auteur(s): Abbas C., Chiaruttini F., Cronenberger S., Scalbert D., Dubin Francois, Lemaitre A., Vladimirova M.(Corresp.)

(Article) Publié: Superlattices And Microstructures, vol. 122 p.643 (2018)


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Résumé:

Density and spin dynamics of indirect excitons in asymmetric GaAs/AlGaAs coupled quantum wells is studied by time-resolved photoluminescence. Under electric bias applied in the growth direction the lifetime of indirect excitons formed by an electron in a wide and hole in a narrow quantum well reaches 12 ns, while the circular polarisation lifetime is about 5 ns. The structure is suited for further studies of dark indirect excitons by time-resolved pump-probe spectroscopy