光诱导金纳米颗粒光栅及表面等离子激元的激发  

Light-Induced Gold Nanoparticle Grating and Excitation of Surface Plasmon Polaritons

作　　者：谭信辉[1] 蔡卫[1] 冀志超[1] 刘国栋[1] 孟涛[1] 李威[1] 张心正[1] 

机构地区：[1]南开大学泰达应用物理研究院弱光非线性光子学教育部重点实验室,天津300457

出　　处：《中国激光》2014年第12期54-58,共5页Chinese Journal of Lasers

基　　金：国家重点基础研究发展计划(2010CB934101;2013CB328702);国家自然科学基金(11374006;11304162);弱光非线性光子学科学与技术创新引智基地(B07013);国家国际科技合作专项(2011DFA52870)

摘　　要：光化学还原方法可以合成金属纳米颗粒并同时实现纳米颗粒形貌和尺寸的控制,是贵金属纳米颗粒合成领域的研究热点之一。提出了一种制备大面积表面金属光栅的方法,利用光化学还原方法合成了金纳米颗粒,并通过双光束干涉的方法在玻璃基底上沉积生成金纳米颗粒光栅,制备出具有一定耦合效率的表面等离子激元(SPP)耦合光栅。金纳米颗粒光栅结构的周期和表面起伏可以通过诱导光参数的改变得以调节。经400℃下半个小时的退火处理后,光栅结构变得更加光滑,其表面等离子激元激发角更接近理论值。Metallic nanoparticles can be synthesized by photochemical reduction method with controllable shape and size, hence the photochemical reduction method has become one of the hot topics in the area of metallic nanoparticle synthesis. A method for fabricating large area metallic grating is provided. Gold nanoparticles are synthesized via photochemical reduction method. Nanoparticle gratings are deposited on the glass substrate under illumination of two coherent beams. Surface plasmon polaritons （SPP） are excited by the grating efficiently. The period and the surface features of metal-gratings can be controlled by adjusting the introduced light beams. After half hour annealing treatment under 400℃, the grating become smoother and the excitation angle of SPPs gets closer to the theoretical value.

关 键 词：光学器件 光栅 金纳米颗粒 表面等离子激元 光化学还原 

分 类 号：O436[机械工程—光学工程]