Upconversion emission of a Er3+-doped glass microsphere under 633 nm excitation

In this work, The TBS glass microspheres doped with Er 3+ for morphology-dependent resonances of upconversion emission were designed. The glass sample components are 25Ti02-27BaC O 3-8Ba(NO 3 ) 2 -6ZnO 2 -9CaC03-5H 3 BO 3 -10SiO 2 -7water glass-3Er 2 O 3 (wt%), and the emission spectra of TBS glass and a TBS glass microsphere (about 48 μm in diameter) were measured under 633 nm excitation and discussed. The strong morphology-dependent resonances of upconversion luminescences in the microsphere were observed. The observed resonances could be assigned by using the well-known Lorenz-Mie Formalism.