1Southwest Institute of Technical Physics, Chengdu 610041 2School of Physics and Electronic Engineering, Yibin University, Yibin 644007 3College of Physics and Energy, and Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fujian Normal University, Fuzhou 350117 4ENREACH Education (ChengDu) of Dipont Education Management Group, Chengdu 617000 5Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054
Abstract：Considered to be a candidate for large-size bulk materials used in lasers and other fields, Nd$^{3+}$-doped glass ceramics containing NaYF$_{4}$ nanocrystallites are prepared. Using x-ray diffraction and transmission electron microscopy, we show that pure cubic NaYF$_{4}$ is well precipitated in the glass matrix. To obtain the optical property of this material at 1.06 μm, the fluorescence decay of $^{4}\!F_{3/2}$ energy levels is measured and analyzed. It is found that the fluorescence lifetime decreases first and then increases with the increasing dopant concentration due to the existing but finally weakening energy dissipation. As a result, a long radiation lifetime of about 191–444 μs is obtained at 1.06 μm in the prepared material. It is thus revealed that Nd$^{3+}$-doped glass ceramic containing NaYF$_{4}$ nanocrystallites is a potential candidate as a near-infrared laser material.
2019, Vol. 36 
