Two-photon Upconversion Luminescence of Eu^(3+):Ca_2Al_2SiO_7 Crystal Irradiated by Infrared femtosecond Laser  

作　　者：汪晨 邱建荣 

机构地区：[1]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [2]Graduate School of the Chinese Academy of Sciences,Beijing 100039,China [3]Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2007年第B12期876-878,共3页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (No.50672087 and No.60778039);National Basic Research Program of China (No.2006CB806000);National High Technology Program of China (No.2006AA03Z304)

摘　　要：Infrared to visible upconversion luminescence was demonstrated in trivalent Europium doped Ca2Al2SiO7 crystal （Eu^3＋：Ca2Al2SiO7） irradiated by focused infrared femtosecond laser. The upconversion luminescence originated from 5D0 to 7Ej （j= 1, 2） transitions of Eu^3＋ The relationship between the upconversion luminescence intensity and the pump power indicated that the upconversion from near-infrared to red is dominated by a two-photon absorption process of Eu^3＋ Analysis suggested that two-photon simultaneous absorption induced population inversion should be the predominant frequency upconversion mechanism.Infrared to visible upconversion luminescence was demonstrated in trivalent Europium doped Ca2Al2SiO7 crystal （Eu^3＋：Ca2Al2SiO7） irradiated by focused infrared femtosecond laser. The upconversion luminescence originated from 5D0 to 7Ej （j= 1, 2） transitions of Eu^3＋ The relationship between the upconversion luminescence intensity and the pump power indicated that the upconversion from near-infrared to red is dominated by a two-photon absorption process of Eu^3＋ Analysis suggested that two-photon simultaneous absorption induced population inversion should be the predominant frequency upconversion mechanism.

关 键 词：optical properties ultrafast lasers multiphoton processes UPCONVERSION 

分 类 号：O611.3[理学—无机化学]