Absorption Spectra, Defect Site Distribution and Upconversion Excitation Spectra of CaF${}_2$/SrF${}_2$/BaF${}_2$:Yb${}^{3+}$:Er${}^{3+}$ Nanoparticles

Sangeetha Balabhadra, Michael F. Reid, Vladimir Golovko +1

We report studies of the Yb${}^{3+}$ site distribution in Er${}^{3+}$ co-doped upconverting alkaline earth fluoride nanoparticles using high-resolution absorption measurements. Similar…