Nd^(3+)/Yb^(3+) co-doped mid-infrared luminescence fluorobromide glass with energy transfer and zero-thermal-quenching IR emission  

作　　者：Jiajia Zhang Xiaosong Zhang Hao Yin Lan Li Zhaowei Zhang Xin Liu Xiaokai Gong Rukun Ding 

机构地区：[1]School of Materials Science and Engineering,Institute of Material Physics,Key Laboratory of Display Materials and Photoelectric Devices,Ministry of Education,Tianjin Key Laboratory for Photoelectric Materials and Devices,and National Demonstration Center for Experimental Function Materials Education,Tianjin University of Technology,Tianjin 300384,China

出　　处：《Journal of Rare Earths》2021年第9期1049-1055,共7页稀土学报（英文版）

基　　金：Project supported by the National Key Foundation for Exploring Scientific Instrument of China(2014YQ.120351);National Natural Science Foundation of China(11504266,51702235,51871167)。

摘　　要：Nd^(3+)/Yb^(3+)co-doped fluorobromide glass samples were prepared by melt quenching.The mid-infrared(MIR)luminescence of the Nd^(3+)/Yb^(3+)co-doped fluorobromide glass was investigated by Br-doping reduces the phonon state density of the matrix.The 3.9μm MIR luminescence of the samples excited at 793 and 980 nm pump excitation was investigated in detail.There is an effective mutual energy transfer process between Nd^(3+)and Yb^(3+).It is proved under 793 nm excitation that the luminescence of Nd^(3+)at 3.9μm is reduced by effective energy transfer from,Nd^(3+):2 H11/2→Yb^(3+):2 F5/2,At the same time,it is proved that the effective energy transfer from Yb^(3+):2 F5/2→Nd^(3+):2 H11/2 under the excitation of 980 nm enhances the luminescence of Nd^(3+)at 3.9μm.In addition,it is found that the samples still have good infrared(IR)luminescent properties when the temperature changes.The emission cross-sectional area and the absorption cross-sectional area areσem(3.87×10^(-20)cm^(2))andσabs(4.25×10^(-20)cm^(2)).The fluorescence decay characteristics of the sample at 3.9μm at the 2 H11/2 level were investigated and the fluorescence lifetime was calculated.The gain performance of the sample was calculated and analyzed,which can reach 4.25×10^(-20)cm^(2).Those results prove that Nd^(3+)/Yb^(3+)co-doped fluorobromide glass is the potential mid-infrared laser gain material.

关 键 词：Mid-infrared luminescence Fluorobromide glass Nd3+/Yb3+co-doped Energy transfer Rare earths 

分 类 号：TQ172.1[化学工程—水泥工业]