Considered to be a candidate for large-size bulk materials used in lasers and other fields,Nd3+-doped glass ceramics containing NaYF4 nanocrystallites are prepared.Using x-ray diffraction and transmission electron mic...Considered to be a candidate for large-size bulk materials used in lasers and other fields,Nd3+-doped glass ceramics containing NaYF4 nanocrystallites are prepared.Using x-ray diffraction and transmission electron microscopy,we show that pure cubic NaYF4 is well precipitated in the glass matrix.To obtain the optical property of this material at 1.06 μm,the fluorescence decay of 4F3/2 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 191-444μs is obtained at 1.06μm in the prepared material.It is thus revealed that Nd3+-doped glass ceramic containing NaYF4 nanocrystallites is a potential candidate as a near-infrared laser material.展开更多
基金Supported by the National Key Research and Development Program of China under Grant No 2017YFB0405302the Scientific Research Fund of Sichuan Provincial Education Department under Grant No 15ZB0294+3 种基金the Key Technical Project of Yibin City in 2015the Scientific Research Project of Yibin University under Grant No 2015PY02the 1000 Talents Plan of Sichuan Provincethe Rongpiao Plan of Chengdu City
文摘Considered to be a candidate for large-size bulk materials used in lasers and other fields,Nd3+-doped glass ceramics containing NaYF4 nanocrystallites are prepared.Using x-ray diffraction and transmission electron microscopy,we show that pure cubic NaYF4 is well precipitated in the glass matrix.To obtain the optical property of this material at 1.06 μm,the fluorescence decay of 4F3/2 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 191-444μs is obtained at 1.06μm in the prepared material.It is thus revealed that Nd3+-doped glass ceramic containing NaYF4 nanocrystallites is a potential candidate as a near-infrared laser material.
