Zeng Huidan, Song Juan, Chen Danping, Yuan Shuanglong, Jiang Xiongwei, Cheng Ya, Yang Yunxia, Chen Guorong
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Opt Express. 2008 Apr 28;16(9):6502-6. doi: 10.1364/oe.16.006502.
We report on the bluish green upconversion luminescence of niobium ions doped silicate glass by a femtosecond laser irradiation. The dependence of the fluorescence intensity on the pump power density of laser indicates that the conversion of infrared irradiation to visible emission is dominated by three-photon excitation process. We suggest that the charge transfer from O(2-) to Nb(5+) can efficiently contribute to the bluish green emission. The results indicate that transition metal ions without d electrons play an important role in fields of optics when embedded into silicate glass matrix.
我们报道了飞秒激光辐照掺杂铌离子的硅酸盐玻璃的蓝绿色上转换发光。荧光强度对激光泵浦功率密度的依赖性表明，红外辐射到可见光发射的转换由三光子激发过程主导。我们认为从O(2-)到Nb(5+)的电荷转移可以有效地促进蓝绿色发射。结果表明，嵌入硅酸盐玻璃基质时，没有d电子的过渡金属离子在光学领域中起着重要作用。
