Further studies of radiation trapping in Er3+ doped chalcogenide glasses

Koughia, Cyril, Craig, Chris, Hewak, Daniel and Kasap, Safa (2018) Further studies of radiation trapping in Er³⁺ doped chalcogenide glasses. Optical Materials, 87, 157-163. (doi:10.1016/j.optmat.2018.02.059).

Record type: Article

Abstract

Strong overlap of emission and absorption spectra of Er³⁺ doped glasses gives rise to effect of radiation trapping (RT) where the quanta are emitted, absorbed and re-emitted many times before leaving the volume of the material. We investigate the steady-state and transient PL of Er³⁺ ions embedded in gallium lanthanum sulphide-oxide glasses with partial substitution of sulfur by oxygen. We develop a technique for direct observation of RT and we show that RT combined with internal reflections leads to uniform spatial distributions of radiation and excited Er³⁺ ions inside of glass sample.

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