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Published on: October 13, 2017
Micro-photoluminescence of GaAs/AlGaAs triple concentric quantum rings
Marco Abbarchi1, Lucia Cavigli, Claudio Somaschini
1L,E,N,S, and Dipartimento di Fisica, Universitá di Firenze, Via Sansone 1, I-50019, Sesto Fiorentino, Italy. marco.abbarchi@lpa.ens.fr.
Abstract:
A systematic optical study, including micro, ensemble and time resolved photoluminescence of GaAs/AlGaAs triple concentric quantum rings, self-assembled via droplet epitaxy, is presented. Clear emission from localized states belonging to the ring structures is reported. The triple rings show a fast decay dynamics, around 40 ps, which is expected to be useful for ultrafast optical switching applications.
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