title: Towards population inversion of electrically pumped Er ions sensitized by Si nanoclusters.
abstract: This study reports the estimation of the inverted Er fraction in a system of Er doped silicon oxide sensitized by Si nanoclusters, made by magnetron sputtering. Electroluminescence was obtained from the sensitized erbium, with a power efficiency of 10(-2)%. By estimating the density of Er ions that are in the first excited state, we find that up to 20% of the total Er concentration is inverted in the best device, which is one order of magnitude higher than that achieved by optical pumping of similar materials.
authors.affiliation: MIND-IN2UB, Dept. Electrònica, Universitat de Barcelona, Martí i Fanquès 1, 08028, Barcelona, CAT, Spain. ojambois@el.ub.es
authors.forename: O
authors.initials: O
authors.lastname: Jambois
authors.forename: F
authors.initials: F
authors.lastname: Gourbilleau
authors.forename: A J
authors.initials: AJ
authors.lastname: Kenyon
authors.forename: J
authors.initials: J
authors.lastname: Montserrat
authors.forename: R
authors.initials: R
authors.lastname: Rizk
authors.forename: B
authors.initials: B
authors.lastname: Garrido