Micro-photoluminescence of GaAs/AlGaAs triple concentric quantum rings.

Authors :: Abbarchi M
Cavigli L
Somaschini C
Bietti S
Gurioli M
Vinattieri A
Sanguinetti S
Source :: Nanoscale research letters [Nanoscale Res Lett] 2011 Oct 31; Vol. 6, pp. 569. Date of Electronic Publication: 2011 Oct 31.
Publication Year :: 2011
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.