title: Self-assembled GaAs/AlGaAs coupled quantum ring-disk structures by droplet epitaxy.
abstract: 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.
authors.affiliation: L-NESS and Dipartimento di Scienza dei Materiali dell'Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Somaschini
authors.forename: S
authors.initials: S
authors.lastname: Bietti
authors.forename: S
authors.initials: S
authors.lastname: Sanguinetti
authors.forename: N
authors.initials: N
authors.lastname: Koguchi
authors.forename: A
authors.initials: A
authors.lastname: Fedorov