Quench-free enhanced emission in cluster-free Er-doped heavy metal oxide glasses
Quench-free enhanced emission in cluster-free Er-doped heavy metal oxide glasses
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DOI：
10.1364/ome.9.001072
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发表时间：
2019-03
影响因子：
2.8
通讯作者：
K. Lipinska;F. Cavallo;A. Ayitou;C. Segre
中科院分区：
文献类型：
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作者：
K. Lipinska;F. Cavallo;A. Ayitou;C. Segre
我们成功地展示了新的重金属镓掺杂氧化物玻璃介质，它能够容纳显著水平的Er3+掺杂，同时避免了浓度猝灭的有害影响。我们研究了玻璃网络的组成和微观结构对光学性质的影响。近红外和可见光发射表明，其不存在浓度猝灭和Er3+聚集现象。拉曼光谱和x射线吸收精细结构光谱都证实了镓以四面体网络前体的形式进入玻璃。在玻璃中加入镓改变了能量格局，创造了两种不同的晶体场环境，促进了Er3+的辐射跃迁。
We successfully demonstrate new heavy metal-gallium-doped oxide glass media, which are capable of accommodating a significant level of Er3+ doping, while avoiding the deleterious effects of concentration quenching. We examine the effects of composition and microstructure of the glass networks on optical properties. Near-infrared and visible emission demonstrate the absence of concentration quenching and Er3+ clustering. Both Raman spectroscopy and X-ray absorption fine structure spectroscopy confirm that gallium enters the glass as a tetrahedral network former. The incorporation of gallium into the glass modifies the energy landscape and creates two distinct crystal field environments, which promote Er3+ radiative transitions.