Towards population inversion of electrically pumped Er ions sensitized by Si nanoclusters.
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.
Jambois
O
O
MIND-IN2UB, Dept. Electrònica, Universitat de Barcelona, Martí i Fanquès 1, 08028, Barcelona, CAT, Spain. ojambois@el.ub.es
Gourbilleau
F
F
Kenyon
A J
AJ
Montserrat
J
J
Rizk
R
R
Garrido
B
B