Characterising energy transfer upconversion in Nd-doped vanadates at elevated temperatures.
Characterising energy transfer upconversion in Nd-doped vanadates at elevated temperatures.
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DOI：
10.1364/oe.26.006478
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发表时间：
2018-03
期刊：
影响因子：
3.8
通讯作者：
S. Cante;S. Beecher;Jacob I. Mackenzie
中科院分区：
文献类型：
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作者：
S. Cante;S. Beecher;Jacob I. Mackenzie
利用简单的自动z扫描技术，在室温到450 K的温度范围内测量了掺Nd的GdVO_4和YVO_4样品的能量转移上转换（ETU）宏观参数。此外，在相同的温度范围内，两种晶体的2 H9/2 + 4F 5/2能级的基态吸收截面的特征在于。从室温到450 K，Nd：YVO_4的808 nm π偏振吸收截面从（58.6 ± 0.2）pm ~ 2减小到（30.9 ± 0.6）pm ~ 2，Nd：GdVO_4的808 nm π偏振吸收截面从（54.0 ± 0.3）pm ~ 2减小到（25.7 ± 0.5）pm ~ 2。在相同的温度范围内，当温度为0.6at时，ETU系数从（3.2 ± 0.7）× 10 ~（-16）cm ~ 3/s下降到（1.8 ± 0.4）× 10 ~（-16）cm ~ 3/s，从（5.0 ± 0.5）× 10 ~（-16）cm ~ 3/s下降到（3.4±0.2）× 10 ~（-16）cm ~ 3/s。%和1 at. % Nd：YVO_4分别为（3.3 ± 0.5）10 ~（-16）cm ~ 3/s到（0.8 ± 0.2）10 ~（-16）cm ~ 3/s和（5.5 ± 0.5）10 ~（-16）cm ~ 3/s到（3.1 ± 0.3）10 ~（-16和1.1at.% Nd：GdVO4。
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 808 nm π-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) 10-16cm3/s to (1.8 ± 0.4 10-16cm3/s and (5.0 ± 0.5) 10-16cm3/s to (3.4±0.2) 10-16cm3/s for 0.6 at. % and 1 at. % Nd:YVO4 respectively, and (3.3 ± 0.5) 10-16cm3/s to (0.8 ± 0.2) 10-16cm3/s and (5.5 ± 0.5) 10-16cm3/s to (3.1 ± 0.3) 10-16cm3/s for 0.5 at.% and 1.1 at.% Nd:GdVO4.