Er³⁺ excited state absorption and the low fraction of nanocluster-excitable Er³⁺ in SiO_x

Abstract

Despite the observation by a number of groups of a strong luminescence sensitization effect of erbium ions by excitation exchange from silicon nanoclusters, there is considerable experimental evidence that the fraction of Er ions excited by Si-nc is actually very low for much of the material reported. In this work, we examine the evidence and point out that Er excited state absorption is the likely cause.

Applied Physics Letters (2006) Vol.89 pp.031116

doi: 10.1063/1.2227637

Click here to download an Acrobat (.pdf) version of the paper.