Selective excitation of up-conversion luminescence by Yb 3+–Er 3+ energy transfer in glass and crystalline phase of oxyfluoride glass ceramics

Abstract

Up-conversion luminescence of oxyfluoride glass and glass ceramics containing LaF 3 crystallites doped with Yb 3+ and Er 3+ was investigated at low temperature. Excitation of Yb 3+ in the IR region revealed the fast and the slow components of Er 3+ up-conversion luminescence originating from both glass and crystalline phases. The temporal differences of the both kinds of the luminescence allowed reconstructing the excitation spectra of the up-conversion luminescence related to the glass and crystalline phases in the glass ceramics.