Properties of anti-stokes photoluminescence and ideal laser cooling performance in Yb-doped yttrium aluminum garnet thin film

被引：0
作者：
Nakayama Y. [1 ]
Nakagawa N. [2 ]
Harada Y. [1 ]
Kita T. [1 ,2 ]
机构：
[1] Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Rokko-dai, Nada-ku, Kobe
[2] Department of Electrical and Electronic Engineering, Faculty of Engineering, Kobe University, Rokko-dai, Nada-ku, Kobe
来源：
Zairyo/Journal of the Society of Materials Science, Japan | 2020年 / 69卷 / 10期
关键词：
(Yb:Y)AG; (Yb:Y)AM; Anti-Stokes photoluminescence; Laser cooling in solids; Thin film;
D O I：
10.2472/JSMS.69.727
中图分类号：
学科分类号：
摘要：
We prepared Yb-doped yttrium aluminum oxide thin film on c-sapphire and fused-quartz substrates by a RF-magnetron sputtering technique for laser cooling application. The sputtered film on c-sapphire shows the high transparency, which is preferable for laser cooling application. The sputtering target of Yb-doped yttrium aluminum perovskite [(Yb:Y)AP] results in the eutectic phase of Yb-doped yttrium aluminum garnet [(Yb:Y)AG)] and Yb-doped yttrium aluminum monoclinic [(Yb:Y)AM)]. A PL spectrum of (Yb:Y)AG+(Yb:Y)AM/c-sapphire shows several strong, sharp peaks originated from the intra-orbital f-f transitions of Yb ions due to the weak reabsorption in the sputtered film. The ideal cooling efficiency of 1.5% in (Yb:Y)AG+(Yb:Y)AM/c-sapphire is comparable to that of a (Yb:Y)AG ceramics. These results suggest that the high laser cooling power is achievable in the sputtered film with high Yb-doping concentration. © 2020 Society of Materials Science Japan. All rights reserved.
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页码：727 / 732
页数：5
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