Photoluminescence characterization of rare-earth stoichiometric compounds of EuGa2S4 Original Research Article

Photoluminescence properties of the stoichiometric compound of EuGa2S4 has been investigated for the first time. The emission appearing in the region of 510–620 nm has a high quantum efficiency value reaching 100% at low temperatures. The characteristics of the emission are similar to those of CaGa2S4:Eu, and can be considered to be due to phonon-terminated transition of the Eu ion. Based on the measured luminescence data, construction feasibility of unique high gain tunable lasers is discussed.