Abstract

Frequency upconversion (UC) is widely used to obtain visible emissions using lasers operating in the infrared region for excitation of samples doped with rare-earth (RE) ions. Generally, these emissions depend strongly on the host material that should have low cutoff phonon frequency in order to present high luminescence efficiency [1]. Additionally, high emission efficiencies depend on the doping strategy used, like using co-dopants and/or metallic nanoparticles [2, 3].

© 2009 IEEE