OH^-对Er^(3+)掺杂Ge-Ga-S-CsI玻璃中红外荧光特性的影响  

Effect of OH^- Content on Mid-infrared Emission Properties in Er^(3+)-doped Ge-Ga-S-CsI Glasses

作　　者：孙杰[1] 聂秋华[1] 戴世勋[1] 吴礼刚[1] 宋宝安[1] 陈飞飞[1] 王国祥[1] 徐铁峰[1] 

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《无机材料学报》2011年第8期836-840,共5页Journal of Inorganic Materials

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~~

摘　　要：采用蒸馏提纯工艺制备了五组不同Er3+离子掺杂浓度的Ge-Ga-S-CsI玻璃样品,测试了样品的折射率、红外透过光谱,以及800nm激光泵浦下样品在2.85μm处的中红外荧光光谱和荧光寿命,计算了样品中OH?在3μm处的红外吸收系数以及Er3+离子与OH?基团相互作用的强度参量KOH-Er,讨论了OH?根杂质对样品中红外荧光特性的影响.结果表明:蒸馏提纯工艺能有效降低玻璃样品中的OH?残留量,增强Er3+离子2.85μm中红外荧光强度和荧光寿命.计算得到KOH-Er值为1.08×10?16cm4/s,由于Er3+离子与OH?之间单声子能量转移的高效性,残存的少量OH?基团仍会影响2.85μm荧光的强度.A series of Er^3＋-doped chalcogenide glasses based on Ge-Ga-S-CsI system were prepared by melt-quenching technique with distillation processing.Properties including refractive index,infrared transmission spectra,2.85μm mid-infrared emission spectra and fluorescence lifetime under 800 nm laser excitation were measured.The infrared absorption coefficients of OH^- groups at 3μm according to the infrared transmission spectra were calcu-lated,and the constant KOH^-Er,determined by the strength of interactions between Er^3＋ ions and OH^- groups in the case of energy transfer was also calculated.The effect of hydroxyl content on mid-infrared emission properties of glass samples was discussed.The results show that the remnants OH^- content of glass samples can be effectively reduced by the distillation processing.The 2.85μm mid-infrared fluorescence emission intensity and fluorescence lifetime of Er^3＋ ions are also enhanced.The calculated constant KOH^-Er is about 1.08×10^-16cm^4/s.Because of the efficiency of energy transfer between Er^3＋ ions and OH^- groups,the remnants of a small amount of OH^- groups can still directly affect the intensity of 2.85μm fluorescence.

关 键 词：OH^- Er离子 中红外荧光 硫系玻璃 

分 类 号：TQ174[化学工程—陶瓷工业]