Self-assembled GaAs/AlGaAs coupled quantum ring-disk structures by droplet epitaxy.
The fabrication, by droplet epitaxy, of a class of quantum nanostructures characterized by a regular, nanometres high, flat disks with a diameter of hundreds of nanometres and a hole at the centre encircled by a ring a few nanometres high, is presented here. A detailed analysis of the growth kinetics performed via in situ and ex situ probes allows us to propose a working model for the formation of these structures.
Somaschini
C
C
L-NESS and Dipartimento di Scienza dei Materiali dell'Università degli Studi di Milano-Bicocca, Milano, Italy.
Bietti
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S
Sanguinetti
S
S
Koguchi
N
N
Fedorov
A
A