Ag掺杂对高重复频率飞秒激光诱导Gd_2O_3-MoO_3-B_2O_3玻璃析晶的影响  

The influence on the crystallization of Ag doped Gd_2O_3-MoO_3-B_2O_3 glass induced by 250 kHz,800 nm femtosecond laser irradiation

作　　者：韩咏梅[1] 易传祥[1] 刘丽萍[2] 张子辰[1] 钟敏建[1] 马洪良[1] 

机构地区：[1]上海大学物理系,上海200444 [2]湖南生物机电职业技术学院,长沙410126

出　　处：《原子与分子物理学报》2014年第4期600-603,共4页Journal of Atomic and Molecular Physics

基　　金：上海高校选拔培养优秀青年教师科研专项基金(ZZSD12118);湖南省教育厅科学研究项目(12C1116)

摘　　要：将800nm高重复频率250kHz的飞秒激光分别聚焦到掺Ag和没有掺Ag的Gd2O3-MoO3-B2O3玻璃表面,研究掺Ag对飞秒激光诱导析晶的影响.对激光辐照的区域显微拉曼分析发现对于没掺Ag玻璃,诱导玻璃析晶需要的激光功率和辐照时间比掺了Ag的玻璃要大要长,这说明Ag的掺入促进了玻璃的析晶.其机理可能为飞秒激光的多光子吸收效应,导致玻璃基质中桥氧键断裂,产生非桥氧空穴和自由电子,玻璃中的Ag离子捕获电离出来的电子被还原成Ag原子,Ag原子在热动力的驱动下移动聚集形成银纳米颗粒,形成的银纳米团簇作为核促进了钼酸盐玻璃的析晶.We report the influence of the Ag doping on the crystallization ofβ′-Gd2 （MoO4 ）3 crystal in the Gd2 O3-MoO3-B2 O3 glasses induced by femtosecond laser irradiation.The fs laser pulses were focused on the surface of Ag-doped Gd2 O3-MoO3-B2 O3 glasses and non-doped Gd2 O3-MoO3-B2 O3 glasses,and the effect of silver on crystallization of b￠-Gd2 （MoO4 ）3 crystals in glasses were analyzed.The results indica-ted that the silver greatly enhanced the crystallization of the glass during the fs pulses irradiation.The responsible mechanism for the observed phenomenon can be explained as follows：The glass oxygen bonds are broken by mlti-photon absorption during the femtosecond irradiation,which results in the non-bridging oxygen holes and free electrons.The Ag＋ ions capture free electrons to form Ag atoms. Ag atoms move and aggregate to form nanoclaster owning to the thermal driving.Ag nanoclusters act as nuclear and greatly promote the crystallization of the glass.

关 键 词：飞秒激光 晶体生长 飞秒激光诱导析晶 

分 类 号：TQ164[化学工程—高温制品工业]