Effect of Si doping on near-infrared emission and energy transfer of Bismuth in silicate glasses |
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Authors: | Nengli Dai Huaixun Luan Bing Xu Lvyun Yang Yubang Sheng Zijun Liu Jinyan Li |
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Institution: | 1. Wuhan National Laboratory for Optoelectronics, School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Wuhan Mechanical Technology College, Wuhan 430075, PR China |
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Abstract: | We have studied the effects of Si doping on the near infrared (NIR) luminescence observed in low Bi doped ( 0.1 mol% ) glasses and the energy transfer from Yb3+ to Bi. The broadband near infrared can only be observed when Si is introduced in the Bi-doped glass. The origin of this fluorescence can be attributed to Bi ions at low valence. Efficient energy transfer from Yb3+ to Bi NIR active ions is achieved by co-doping of Si. There is an increment of about ~ 29 times of the emission intensity from Bi-related active center as the Yb3+ concentration varies from 0 to 2.0 mol% and the amount of Si is 0.05 mol% under 980 nm excitation. The possible mechanism of energy transfer from Yb3+ to Bi is also discussed. |
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