Upconversion luminescence in Thulium-Doped NaYF_4 Nanoparticles Excited by a 980 nm Laser

摘要

Upconversion luminescence at ～800 nm based on Thulium-doped NaYF_4 nanoparticles excited by a 980 nm laser has been experimentally demonstrated. Under different concentrations, the fluorescence power is proportional to the pump power.