摘要
用熔融淬冷法制备了系列掺杂浓度的Dy3+:Ge-Ga-S-CsI硫卤玻璃样品,测试了样品拉曼光谱、折射率、吸收光谱、近红外及中红外荧光谱.应用Judd-Ofelt理论计算了Dy3+离子的强度参数(Ωi,i=2,4,6)、自发辐射跃迁概率(A)、荧光分支比(β)、以及辐射寿命(τrad)等光谱参数.研究了810nm激光抽运下样品中红外荧光特性与掺杂浓度之间变化关系,计算了常温下Dy3+:6H13/2→6H15/2(2.86μm)和6H11/2→6H13/2(4.38μm)跃迁多声子弛豫速率(Wmp)、以及Ge-Ga-S-CsI玻璃基质中电子-声子结合常数(α).
A series of chalcogenide glasses based on Ge-Ga-S-CsI system doped with different Dy^3 ＋ ions were synthesized by melt-quenching technique. The refractive indices,Raman spectra,absorption spectra,near-and mid-infrared fluorescence of glass samples were measured. The intensity parameters （Ωi,i = 2,4,6）,transition probabilities （ A）,branching ratios （β） and radiation lifetimes （τrad） have been predicted for Dy3 ＋ ions in the samples by using the Judd-Ofelt theory. The mid-infrared fluorescence properties were investigated for different Dy3 ＋ ion concentrations under 810 nm laser excitation. The multiphonon relaxation rates （Wmp） of Dy^3 ＋ ：^6 H 13/2→^6 H 15/2（2. 86 μm） and^6 H 11/2→6 H 13/2（4. 38 μm）,and the constant related to the e-p coupling strength （ α ） of Ge-Ga-S-CsI glasses were evaluated.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第5期3547-3553,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60878042
60978058)
中国博士后基金(批准号:20080430204)
浙江省自然科学基金(批准号:Y407253
Y1090996)
中国科学院和宁波大学王宽诚基金资助的课题~~
关键词
硫系玻璃
中红外发光
Dy^3+掺杂
多声子弛豫
chalcogenide glass
mid-infrared luminescence
Dy3＋-doped
multiphonon relaxation
