Intense red upconversion emission in infrared excited holmium-doped PbGeO3-PbF2-CdF2 transparent glass ceramic
Intense red upconversion emission in infrared excited holmium-doped PbGeO3-PbF2-CdF2 transparent glass ceramic
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DOI：
10.1016/j.jlumin.2004.04.005
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发表时间：
2004-10
影响因子：
3.6
通讯作者：
A. Gouveia-Neto;E. B. Costa;L. Bueno;S. Ribeiro
中科院分区：
文献类型：
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作者：
A. Gouveia-Neto;E. B. Costa;L. Bueno;S. Ribeiro
在含有 β-PbF2:Ho3+ 纳米晶体的 PbGeO3–PbF2–CdF2 透明玻璃陶瓷中，呈现出 650nm 附近的强红光上转换发射。钬掺杂玻璃陶瓷样品由 980 nm 二极管激光源激发。 650nm 上转换信号被分配给钬离子的 5F5→5I8 跃迁。还检测到分别对应于5F2、3→5I8和4S2、5F4→5I8跃迁的490和540nm附近的极低强度信号。上转换激发机制是通过逐步声子辅助多光子吸收、涉及钬离子对的交叉弛豫过程以及激发态吸收的组合来实现的。使用 850nm 左右的二极管激光泵浦源，540nm 左右的绿色上转换发射是观察到的主要信号。
Intense red upconversion emission around 650nm in PbGeO3–PbF2–CdF2transparent glass ceramic containing β-PbF2:Ho3+nanocrystals, is presented. The holmium-doped vitroceramic samples were excited by a 980nm diode laser source. The 650nm upconversion signal was assigned to the5F5→5I8transition of holmium ions. Very low intensity signals around 490 and 540nm corresponding to the5F2,3→5I8and4S2,5F4→5I8transitions, respectively, were also detected. The upconversion excitation mechanism was achieved through a combination of stepwise phonon-assisted multiphoton absorption, cross-relaxation processes involving pairs of holmium ions, and excited-state absorption. Using a diode laser pump source around 850nm green upconversion emission around 540nm was the observed predominant signal.