Excitation of Anti-Stokes Luminescence in Y2O2S:Er Ceramics with the Participation of the Erbium 4I13/2 Metastable State

Emission and visible photoluminescence excitation spectra of Y2O2S:Er (1 at %) ceramics have been studied under different optical pumping conditions. The results demonstrate that visible anti-Stokes luminescence of the erbium-doped material has higher intensity in the case of pumping of the I-4(13/2) metastable state of the dopant. Resonance IR photon wavelengths have been determined for two-photon excitation of visible emission in Y2O2S:Er. A method has been developed for the optical excitation of metastable states (excited-state excitation (ESE)) in anti-Stokes luminescence, which allows the nature of the corresponding electronic transitions in emission centers to be identified.

Automated summary

The emission and visible photoluminescence excitation spectra of Y2O2S:Er (1 at %) ceramics were investigated. The results showed that the visible anti-Stokes luminescence of the erbium-doped material exhibited higher intensity when pumped with the I-4(13/2) metastable state. The study also developed an optical excitation method for the metastable states in anti-Stokes luminescence.