Photoluminescence in Er-doped Ge–Ga–Se glasses

Spatial distribution of rare-earth ions in Se-based chalcogenide glasses with or without Ga

“…This observation also confirms that the RE ions have a chemical and structural preference for Ga over Ge or Sb as their nextnearest neighbors. Concentration of Ga relative to that of Pr in our 99.95(Ga 0.05 Ge x Sb y Se 0.95ÀxÀy )À0.05Pr samples is sufficient to guarantee that all the doped Pr 3+ ions are structurally correlated with the Ga tetrahedra [33].…”

Recent photoluminescence research on chalcogenide glasses for photonics applications

“…4 I 15/2 transition) is normalized to the sample thickness and the optical absorption coefficient at the excitation wavelength of 976 nm. The shape of the PL peak shows a slight variation for different glass compositions and Er concentrations with the C Ga /C Er ratio being the main parameter [18]. Nevertheless, those changes do not affect the measured PL intensity at 1542 nm significantly.…”

Photoluminescence in Er‐doped AgGaS2–GeS2 glasses

“…1) and have little differences as compared to that of other materials [5][6][7]. Figure 1 shows the complex shape of the emission spectra.…”

“…Therefore, basing on the energy-level-diagram of Er 3+ ions [7,10], the experimental data can be explained as follows. Upon the influence of the infra-red light with λ≈980 nm, Er 3+ ions turn into the excited state 4 I 11/2 ( 4 I 15/2 → 4 I 11/2 ).…”