纳米银颗粒掺杂铋酸盐玻璃的光谱与三阶非线性光学特性研究  

Study on Spectroscopy and Third-Order Optical Nonlinear Characteristics of Ag-Nanoparticles Embedded Bismuthate Glass

作　　者：成俊雯[1,2] 陈飞飞[1,2] 戴世勋[1,2] 许银生[3,2] 谭瑞琴[1,2] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]宁波大学红外材料及器件实验室,浙江宁波315211 [3]宁波大学材料化学与工程学院,浙江宁波315211

出　　处：《光谱学与光谱分析》2013年第6期1642-1646,共5页Spectroscopy and Spectral Analysis

基　　金：国家科技部重大国际合作项目(2001DFA12040);国家重点基础研究发展(973计划)项目(2012CB722703);教育部新世纪优秀人才计划项目(NCET-10-0976);浙江省杰出青年科学基金项目(R1101263);浙江省自然科学基金项目(LQ12F05003);宁波大学王宽诚幸福基金资助

摘　　要：采用新型的热化学还原法,制备了银纳米颗粒掺杂的铋酸盐复合玻璃材料。利用紫外-可见吸收光谱观察到了银纳米颗粒表面等离子谐振(SPR)吸收的峰值位移特性,用拉曼光谱表征了引入银纳米颗粒后玻璃的结构变化。借助飞秒激光脉冲激发下的Z扫描与光克尔闸技术,在近红外波段下研究了材料的三阶非线性光学特性。研究结果表明银纳米颗粒铋酸盐复合材料有着亚皮秒级的非线性响应时间,并且其非线性折射率γ在纳米颗粒的热电子效应以及局部场效应的影响下,较基质玻璃最高可以提升29倍。In the present paper, Ag nanoparticles embedded bismuthate glass composite was prepared by using a novel thermc^- chemical reduction method. Red shift of surface plasmon resonance （SPR） absorption of the Ag nanoparticles was observed by utilizing UV-visible absorption spectra. The Raman spectra evidenced the evolution of the structural units of the glass after intro- duction of Ag nanoparticles. Z-scan and optical Kerr shutter technique with femtosecond laser as excitation source was applied to investigate the third-order optical nonlinearities of the nanocomposite in near-infrared region. The results show that the silver bismuthate nanocomposite possesses Kerr response in scale of sub-picosecond, and its nonlinear refraction γ was dramatically increased up to 29 times under the influences of hot electron effect and local field effect.

关 键 词：铋酸盐玻璃 银纳米颗粒 表面等离子谐振 三阶非线性 

分 类 号：TQ174[化学工程—陶瓷工业]