Europium doped gallium oxide nanostructures for room temperature luminescent photonicdevices

Abstract

Cathodoluminescence and photoluminescence techniques havebeen used to investigate room temperature light emission fromβ-Ga2O3:Eu nanostructures, which were obtained by two methods. In one of them, a mixture ofGa2O3/Eu2O3 powders was used as precursor material and annealed under an argon flow. In the other one, undopedβ-Ga2O3 nanostructures were first obtained by thermal oxidation of metallic gallium and europium wassubsequently incorporated by a diffusion process. Room temperature luminescence at 610 nm due toEu3+ intraionictransitions from β-Ga2O3:Eu has been observed. Waveguiding of this red emitted light through the structures was shown.