Yb^(3+)敏化Tm^(3+)掺杂氧卤碲酸盐玻璃的上转换发光研究  

Invesitigation on Upconversion Luminescence of Yb^(3+)-Sensitized Tm^(3+)-Doped Oxyhalide Tellurite Glasses

作　　者：徐时清[1] 黄俊[1] 张丽艳[1] 赵士龙[1] 王宝龄[1] 胡丽丽[2] 姜中宏[2] 

机构地区：[1]中国计量学院信息工程学院光电材料与器件研究所,杭州310018 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2006年第2期225-229,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60508014;50502030)资助课题

摘　　要：研究了Yb2O3浓度对Tm3+/Yb3+共掺氧卤碲酸盐玻璃的上转换发光的影响,分析了上转换发光机理。结果发现,通过980 nm的激光二极管激发,在室温下同时观察到强烈的蓝光(475 nm)和微弱的红光(649 nm),分别是由于Tm3+离子1G4→3H6和1G4→3F4跃迁产生的;上转换机理分析表明,上转换蓝光和红光都是由于双光子吸收过程。随Yb2O3浓度增加,Yb3+离子寿命降低,Yb3+到Tm3+的能量转移效率增加,上转换蓝光和红光强度先增加,在Yb2O3摩尔比为3时达到最大,然后降低。分析认为,Yb3+的浓度猝灭主要是由于3H4(Tm3+)→2F5/2(Yb3+)反向能量转移的结果。结果表明Yb3+敏化Tm3+掺杂氧卤碲酸盐玻璃是一种上转换蓝光激光器的潜在基质材料。The effects of Yb2O3 concentration on upconversion luminescence spectra of Tm^3＋/Yb^3＋-codoped oxyhalide tellurite glasses were studied, and upconversion luminescence mechanism of Yb^3＋ sensitize Tm^3＋ in oxyhalide tellurite glasses was analyzed. The results showed that intense blue （475 nm） and weak red （649 nm） emission corresponding to the ^1 G4→^3 H6 and ^1G4→^3 F4 transitions of Tm^3＋ , respectively, were simultaneously observed at room temperature under 980 nm laser diode （LD） excitation. Upconversion mechanism analysis showed that a two-photon upconversion process is assigned to the blue and red emission; with increasing Yb2O3 concentration, the lifetime of Yb^3＋ decreases, the energy transfer efficiency of Yb^3＋ to Tm^3＋ increases, upconversion blue and red emission intensities first increase, reach its maximum at molar ratio 3 of Yb2O3 concentration, and then decrease. It is considered that the concentration quenching of Yb^3＋ is due to energy backtransfer of ^3 H4 （Tm^3＋ ） →2 F5/2 （Yb^3＋ ）. The results showed that Yb^3＋ -sensitized Tm^3＋ -doped oxyhalide tellurite glasses can be used as a kind of potential host materials for upconversion blue lasers.

关 键 词：光学材料 上转换发光 氧卤碲酸盐玻璃 Tm^3+/Yb^3+共掺 

分 类 号：TQ171.112[化学工程—玻璃工业]