High pressure luminescence and time resolved spectra of LiNbO3:Pr3+

Abstract

Emission, luminescence excitation spectra and photoluminescence spectra at high pressure of LiNbO₃ crystal doped with 0.5% Pr³⁺ are presented. Hydrostatic pressure up to 135kbar was applied with a diamond anvil cell (DAC). We observed the small red shift of the luminescence related to ¹D₂→³H₄ transition equal to 0.08nm/kbar. Additionally, at higher pressure, the ¹D₂ emission was considerably quenched and its lifetime was shortened. This was explained as being due to the decrease of the energy of the exciton bound to the Pr³⁺ ion with increasing pressure and nonradiative depopulation of the ¹D₂ state.

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References

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