Characterising energy transfer upconversion in Nd-doped Vanadates at elevated temperatures

Cante, Silvia, Beecher, Stephen J. and Mackenzie, Jacob (2018) Characterising energy transfer upconversion in Nd-doped Vanadates at elevated temperatures. Optics Express, 26 (6). (doi:10.1364/OE.26.006478).

Record type: Article

Abstract

The Energy Transfer Upconversion (ETU) macroparameter is measured for Nd-doped GdVO4 and YVO4 samples at temperatures ranging from Room Temperature (RT) to 450K, by means of a simple and automated z-scan technique. Furthermore, the ground state absorption cross section into the 2H9/2+4F5/2 energy levels is characterised for both crystals over the same range of temperatures. The 808nm pi-polarisation absorption cross section is found to decrease from (58.6+-0.2) pm2 to (30.9+-0.6) pm2 for Nd:YVO4 and (54.0+-0.3) pm2 to (25.7+-0.5) pm2 for Nd:GdVO4, from RT to 450K. Over the same range the ETU coefficient decreases from (3.2+-0.7) e-16 cm3/s to (1.8+-0.4) e-16 cm3/s and (5.0+-0.5) e-16 cm3/s to (3.4+-0.2) e-16 cm3/s for nominally 0.5at.% and 1.0at.% Nd:YVO4 respectively, and (3.3+-0.5) e-16 cm3/s to (0.8+-0.2) e-16 cm3/s and (5.5+-0.5) e-16 cm3/s to (3.1+-0.3) e-16 cm3/s for 0.5at.% and 1.0at.% Nd:GdVO4.

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Characterising energy transfer upconversion in Nd-doped Vanadates at elevated temperatures - Accepted Manuscript

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