Structural and optical properties of ge nanocrystals embedded in Al2O3.
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.
Caldelas
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Centre of Physics, University of Minho, 4710-057 Braga, Portugal.
Rolo
A G
AG
Chahboun
A
A
Foss
S
S
Levichev
S
S
Finstad
T G
TG
Gomes
M J M
MJ
Conde
O
O