Enhanced absorption and emission of Y3Al5O12:Ce3+ thin layers prepared by epoxide-catalyzed sol-gel method

被引:31
作者
Murai, Shunsuke [1 ,2 ]
Verschuuren, Marc A.
Lozano, Gabriel [1 ]
Pirruccio, Giuseppe [1 ]
Koenderink, A. Femius [1 ]
Rivas, Jaime Gomez [1 ,3 ]
机构
[1] Philips Res Labs, FOM Inst AMOLF, Ctr Nanophoton, NL-5656 AE Eindhoven, Netherlands
[2] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Nishikyo Ku, Kyoto 6158510, Japan
[3] Eindhoven Univ Technol, COBRA Res Inst, NL-5600 MB Eindhoven, Netherlands
来源
OPTICAL MATERIALS EXPRESS | 2012年 / 2卷 / 08期
关键词
LUMINESCENT PROPERTIES; SINGLE-CRYSTAL; FILMS; MONOLITHS; YAG; DEPOSITION;
D O I
10.1364/OME.2.001111
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have developed a method for fabricating thin layers of Ce3+ doped yttrium aluminium garnet, Y3Al5O12 (YAG:Ce) based on a sol-gel approach with propylene oxide as a gelation initiator. A single spin-coating process followed by a sequence of heat treatments allows the fabrication of polycrystalline YAG:Ce thin layers with a thickness of a few hundreds of nanometers. Surface morphology, crystallite size, and quantum efficiency are examined as a function of heat treatment temperature. The optical quality of the layer is further investigated by measuring the enhanced absorption of light coupled into the layer. We fabricate a three-layered slab waveguide system consisting of a fused silica glass substrate, a YAG:Ce layer and a SiO2 upper layer, and excite the system by illumination through a prism. The incident light couples to the fundamental waveguide mode in the YAG:Ce layer where it is eventually absorbed, resulting in an enhancement of absorption by a factor of 30. In correspondence, we observe a similar increase in emission intensity of photoluminescence caused by the enhanced absorption. (C)2012 Optical Society of America
引用
收藏
页码:1111 / 1120
页数:10
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