title: Structural and optical properties of ge nanocrystals embedded in Al2O3.
abstract: Ge nanocrystals (NCs) embedded in aluminum oxide were grown by RF-magnetron sputtering. Raman, high resolution transmission electron microscopy (HRTEM), selected area diffraction (SAD), and X-ray diffraction (XRD) techniques confirmed good cristallinity of the NCs from samples annealed at 800 degrees C. The average NC size was estimated to be around 7 nm. Photoluminescence (PL) measurements show an emission related to the NCs. The temperature dependence of the PL confirms the confinement phenomenon in the Ge NCs.
authors.affiliation: Centre of Physics, University of Minho, 4710-057 Braga, Portugal.
authors.forename: P
authors.initials: P
authors.lastname: Caldelas
authors.forename: A G
authors.initials: AG
authors.lastname: Rolo
authors.forename: A
authors.initials: A
authors.lastname: Chahboun
authors.forename: S
authors.initials: S
authors.lastname: Foss
authors.forename: S
authors.initials: S
authors.lastname: Levichev
authors.forename: T G
authors.initials: TG
authors.lastname: Finstad
authors.forename: M J M
authors.initials: MJ
authors.lastname: Gomes
authors.forename: O
authors.initials: O
authors.lastname: Conde