Broadband Near-IR Emission in Tm/Er-Codoped GeS_2-In_2S_3-Based Chalcohalide Glasses

摘要

The near IR emission spectra of Tm/Er-codoped GeS_2-In_2S_3-based chalcohalide glasses are studied with an 808 nm laser as excitation source. A broad emission with a full-width at half-maximum of ～170 nm is recorded in a 0.5Tm_2S_3-0.1Er_2S_3-codoped 70GeS_2-20In_2S_3-10CsBr (in mol%) glass. The luminescence mechanisms are discussed with different Csl concentration, different halogen atoms, and different In content. These results suggest that both halogen (X) atoms and [InS_xX_(4-x)] structural units can enhance the emission intensity located at 1460 nm.