E Chengqi, Bu Yanyan, Meng Lan, Yan Xiaohong
College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China.
Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province Nanjing, Jiangsu, 210023, China.
Nanoscale Res Lett. 2017 Dec;12(1):402. doi: 10.1186/s11671-017-2167-9. Epub 2017 Jun 12.
Er-doped and Er-Tm-co-doped transparent hexagonal NaGdF glass ceramics are fabricated via melt-quenching method. The emissions of Er-doped NaGdF glass ceramics are adjusted from the green to red by varying the concentration of Tm ion under the excitation of 980 nm. The spectrum, thermal quenching ratio, fluorescence intensity ratios, and optical temperature sensitivity of the transparent glass ceramics are observed to be dependent on the pump power. The maximum value of relative sensitivity reaches 0.001 K at 334 K in Er-doped NaGdF, which shifts toward the lower temperature range by co-doping with Tm ions, and has a maximum value of 0.00081 K at 292 K. This work presents a method to improve the optical temperature behavior of Er-doped NaGdF glass ceramics. Moreover, the relative sensitivity S is proved to be dependent on the pump power of 980-nm lasers in Er-doped NaGdF and Er-Tm-co-doped NaGdF.
通过熔体淬火法制备了掺铒和铒-铥共掺杂的透明六角形NaGdF玻璃陶瓷。在980nm激发下，通过改变铥离子浓度，将掺铒NaGdF玻璃陶瓷的发射从绿色调节到红色。观察到透明玻璃陶瓷的光谱、热猝灭率、荧光强度比和光学温度灵敏度取决于泵浦功率。掺铒NaGdF在334K时相对灵敏度的最大值达到0.001K，通过与铥离子共掺杂，该最大值向较低温度范围移动，在292K时最大值为0.00081K。这项工作提出了一种改善掺铒NaGdF玻璃陶瓷光学温度行为的方法。此外，在掺铒NaGdF和铒-铥共掺杂NaGdF中，相对灵敏度S被证明取决于980nm激光的泵浦功率。
