Ag纳米颗粒增强的Ho^(3+)/Tm^(3+)共掺铋锗酸盐玻璃的2μm发光研究  

Ag nanoparticles enhanced 2 μm luminescences of Ho^(3+)/Tm^(3+) codoped bismuth germanate glasses

作　　者：薛冰[1,2] 许银生[1] 李烟塬 戚嘉妮[1,2] 鲁珊珊[2] 鲁克伦 陈丽艳[1] 张绍骞 戴世勋[1] 

机构地区：[1]宁波大学高等技术研究院,宁波315211 [2]宁波大学材料科学与化学工程学院,宁波315211 [3]宁波大学科学技术学院,宁波315211 [4]中国科学院大连化学物理研究所,大连116023

出　　处：《物理学报》2014年第10期399-405,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61205181;61308092);浙江省自然科学基金(批准号:LQ12E02003);宁波市自然科学基金(批准号:2012A610122);浙江省教育厅科研计划(批准号:Y201120457);教育部留学回国人员科研启动基金;宁波大学王宽诚幸福基金资助的课题~~

摘　　要：采用基于传统熔融淬冷技术的热化学还原法制备了系列Ag纳米颗粒复合Ho3+/Tm3+共掺铋锗酸盐玻璃样品,研究了Ag纳米颗粒含量对玻璃2μm发光特性的影响.结果表明,Ag纳米颗粒的表面等离子体共振带位于500—900 nm,峰值位于650 nm,透射电子显微镜图像中观察到均匀分布的Ag纳米颗粒,尺寸约为5—10 nm.通过测试玻璃样品在1.7—2.3μm波段的荧光光谱发现,Ag掺杂后Ho3+离子2μm处的荧光强度得到了极大的提高,其中AgCl掺杂质量分数为0.3%时的荧光强度比未掺杂时的荧光强度增强10倍,这归因于Ag纳米颗粒的局域场增强作用.计算得到Ho3+离子的吸收截面为0.491×10-20cm-2,发射截面为1.03×10-20cm-2,当增益系数为0.2时即可实现正的增益.The Ho^3＋/Tm^3＋ codoped bismuth germanate glasses containing Ag nanoparticles （NPs） are synthesized by a chemical reduction method based on the conventional melting-quenching technique. The effect of concentration of Ag NPs on the 2 μm emission is studied. The absorption band related to the surface plasmon resonance （SPR） of the Ag NPs is located in a range from 500 to 900 nm. Transmission electron microscopic image clearly reveals homogeneously dispersed Ag NPs with the sizes ranging from 5 to 10 nm. The luminescence spectra in a range of 1.7-2.3 μm are collected. With the addition mass fraction of the AgCl up to 0.3%, the intensity of emission band of Ho^3＋ ions, centered at 2.03 μm, is increased by 10 folds. The enhancement of 2 μm luminescence is attributed to the enhanced local field induced by SPR of Ag NPs. The calculated absorption cross section and emission cross section are 0.491 ×10^-20 cm^-2 and 1.03 × 10^-20 cm^-2, respectively. When the gain coefficient p = 0.2, the positive gain would be realised.

关 键 词：AG纳米颗粒 等离子体共振 中红外发光 

分 类 号：TB383.1[一般工业技术—材料科学与工程]