Upconversion processes of Er3+ in ZrO2-CaO eutectic crystals

R. Balda; J. Fernández; R. I. Merino; J. I. Peña; V. M. Orera

doi:10.1117/12.760413

5 February 2008 Upconversion processes of Er³⁺ in ZrO₂-CaO eutectic crystals

R. Balda, J. Fernández, R. I. Merino, J. I. Peña, V. M. Orera

Proceedings Volume 6890, Optical Components and Materials V; 689004 (2008) https://doi.org/10.1117/12.760413
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

In this work we report the infrared to visible upconversion luminescence in Er³⁺-doped ZrO₂-CaO eutectic crystals with an ordered microstructure. The microstructure consists of alternating 2 μm thick lamellae of calcia-stabilized zirconia (CaSZ) and CaZrO₃ crystals. Er³⁺ ions enter both phases but at a higher concentration in CaSZ. Site selective excitation at different wavelengths along the ⁴I_15/2→⁴I_9/2 absorption band allows to select the upconverted emission from Er³⁺ ions corresponding to the two components of the eutectic samples. Depending on the excitation wavelength the upconversion emission spectrum is dominated either by the CaZrO₃ contribution, with an intense green emission characterized by sharp peaks from (²H_11/2,⁴S_3/2) levels together with a more weak red emission from ⁴F_9/2 level, or by the CaSZ phase with broad green and red emissions with an enhancement of the red emission from level ⁴F_9/2. The possible upconversion mechanisms are discussed in terms of excitation power dependence and lifetimes of the upconversion emissions.

Citation Download Citation

R. Balda, J. Fernández, R. I. Merino, J. I. Peña, and V. M. Orera "Upconversion processes of Er³⁺ in ZrO₂-CaO eutectic crystals", Proc. SPIE 6890, Optical Components and Materials V, 689004 (5 February 2008); https://doi.org/10.1117/12.760413

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