Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses
Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses
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掺铋锗酸盐玻璃的多功能可调谐超宽带可见光和近红外发光
DOI：
10.1063/1.4791698
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发表时间：
2013-02
影响因子：
3.2
通讯作者：
Qiu Jianrong
中科院分区：
文献类型：
--
作者：
Xu Beibei;Zhou Shifeng;Tan Dezhi;Hong Zhanglian;Hao Jianhua;Qiu Jianrong
在这里，我们提出了三种简单的方法来实现波长可调谐发光在同一主体材料与单一掺杂剂，即，通过调节掺杂水平、制备温度和气氛。在此基础上，在掺铋锗酸盐玻璃中获得了覆盖整个光通信窗口的超宽带可调谐近红外发光，其最大半峰全宽约为500nm。随着激发波长的变化，还观察到波长可调的发光。采用系统的研究策略探讨了锗酸盐玻璃近红外发光的物理起源，提出了三种不同的铋活性中心对锗酸盐玻璃近红外发光的贡献。结合玻璃中这些活性中心的浓度、能量传递和化学平衡，对可调谐发光给出了全面的解释。随着熔炼温度的升高和制备气氛还原程度的增加，铋物种由Bi 3 π → Bi 2 π、B i π、B i 0和铋团簇，再向铋胶体转变。特别感兴趣的是，通过调节掺杂水平，制备气氛和激发波长，也观察到红色可调谐发光。此外，锗酸盐玻璃中的陷阱电子中心可以与高价态的铋物种发生相互作用，导致低价态铋活性中心的形成和陷阱电子中心的减少。这种可调谐的超宽带发光有助于更好地理解掺Bi玻璃的近红外发光的起源，并可能在各种光学器件中具有潜在的应用。V C 2013美国研究所
Here, we present three facile approaches to achieve wavelength tunable luminescence in the same host material with single dopant, i.e., by modulating doping level, preparation temperature, and atmosphere. Based on these methods, ultra-broadband tunable near-infrared luminescence with the largest full width at half maximum of about 500nm covering the whole windows of optical communication has been obtained in bismuth-doped germanate glasses. Wavelength tunable luminescence is also observed with the change of excitation wavelength. Systematical strategy was followed to approach the physical origin of the near-infrared luminescence and we proposed that three different bismuth active centers contribute to the near-infrared luminescence in the germanate glasses. A comprehensive explanation for the tunable luminescence is given, combining the concentration, energy transfer, and chemical equilibrium of these active centers in the glasses. With the increase of melting temperatures and the increase of reducing extent of the preparation atmosphere, bismuth species transform from Bi 3þ to Bi 2þ ,B i þ ,B i 0 and bismuth clusters, and then to bismuth colloid. Of particular interest is that red tunable luminescence was also observed by modulating doping level, preparation atmosphere, and excitation wavelength. Besides, the trapped-electron centers in germanate glasses can interact with bismuth species of high valence states leading to the formation of bismuth active centers of low valence states and the decrease of trapped-electron centers. This tunable ultra-broadband luminescence is helpful for a better understanding of the origin of the near-infrared luminescence in Bi-doped glasses and may have potential applications in varieties of optical devices. V C 2013 American Institute of
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影响因子：
4
作者：
BLASSE, G;MEIJERINK, A;ZUIDEMA, J
通讯作者：
ZUIDEMA, J
影响因子：
3.8
作者：
Romanov, Alexey N.;Fattakhova, Zukhra T.;Sulimov, Vladimir B.
通讯作者：
Sulimov, Vladimir B.
影响因子：
3.2
作者：
H. Masai;Y. Takahashi;T. Fujiwara;Takenobu Suzuki;Y. Ohishi
通讯作者：
H. Masai;Y. Takahashi;T. Fujiwara;Takenobu Suzuki;Y. Ohishi
影响因子：
3.6
作者：
Hong-Tao Sun;Y. Sakka;M. Fujii;N. Shirahata;Hong Gao
通讯作者：
Hong-Tao Sun;Y. Sakka;M. Fujii;N. Shirahata;Hong Gao
影响因子：
3.6
作者：
E. .. Kustov;L. I. Bulatov;V. Dvoyrin;V. Mashinsky
通讯作者：
E. .. Kustov;L. I. Bulatov;V. Dvoyrin;V. Mashinsky