Er^(3+)/Tm^(3+)共掺杂Ga_5Ge_(20)Sb_(10)S_(65)玻璃的发光特性及能量传递  

Luminescence and Mechanism of Energy Transfer of Er_(3+)/Tm_(3+)-codoped Ga_5Ge_(20)Sb_(10)S_(65) Glass

作　　者：黄正裕[1,2] 戴世勋[1] 林常规[1] 王训四[1] 沈祥[1] 徐铁峰[1] 聂秋华[1] 

机构地区：[1]宁波大学信息科学与工程学院 [2]中国人民解放军91765部队

出　　处：《发光学报》2011年第6期565-570,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(60878042;60978058);浙江省杰出青年基金(R1101263);宁波市科技创新团队项目(2009B21007);宁波大学王宽诚幸福基金资助项目

摘　　要：采用高温熔融急冷法制备了系列Er3+/Tm3+共掺杂的Ga5Ge20Sb10S65玻璃,测试了样品的吸收光谱,以及分别在980 nm和800 nm LD激发下样品的荧光光谱。运用Judd-Ofelt理论计算了Er3+离子在Ga5Ge20Sb10S65玻璃中的强度参数Ωi(i=2,4,6)、自发辐射跃迁几率A和辐射寿命τ等光谱参数。掺杂Tm3+离子主要是为了降低Er3+:4I13/2的能级寿命,这是因为Er3+:4I13/2→Tm3+:3F4两个能级之间发生了能量传递,从而增加Er3+离子在4I11/2能级与4I13/2能级之间发生粒子数反转的可能。结果表明,Er3+/Tm3+共掺杂Ga5Ge20Sb10S65玻璃随着Tm3+离子浓度的增加,2.76μm处的中红外荧光先增强,然后有所减弱。Er3＋/Tm3＋-codoped Ga5Ge20Sb10S65 glasses were prepared by traditional melt-quenching method.Fluorescence spectra were investigated under 980 nm and 800 nm LD excitation.Combined with their absorption spectra,the Judd-Ofelt intensity parameters Ωi（i=2,4,6）,spontaneous transition probabilities A and rediative lifetomes τ for Er3＋ ion were calculated by Judd-Ofelt theory.Due to the energy transfer from 4I13/2 of Er3＋ to 3F4 of Tm3＋,the addition of Tm3＋ significantly reduced the lifetime of the 4I13/2 level of Er3＋,that in turn increase the possibility of population inversion between the 4I11/2 and 4I13/2 levels of Er3＋.It is learned that the intensity of 2.76 μm mid-infrared fluorescence firstly increased,and then dropped in the Er3＋/Tm3＋-doped Ga5Ge20Sb10S65 glasses with the increase of Tm3＋ ion concentration.

关 键 词：硫系玻璃 Er3+/Tm3+共掺杂 能量转移 

分 类 号：O482.31[理学—固体物理]