银半球壳包覆PS微球的纳米结构制备及非对称光学性质研究  

Polystyrene spheres based nano structures and its non-symmetric optical characteristics

作　　者：施庭兴 肖双江 席瑞骏 肇珣 朱红波[1,2] 严端廷 王春亮[1,2] SHI Ting-xing;XIAO Shuang-jiang;XI Rui-jun;ZHAO Xun;ZHU Hong-bo;YAN Duan-ting;WANG Chun-liang(School of Physics,Northeast Normal University,Changchun 130024,China;National Demonstration Center for Experimental Physics Education (Northeast Normal University),Northeast Normal University,Changchun 130024,China)

机构地区：[1]东北师范大学物理学院,吉林长春130024 [2]东北师范大学物理学师范专业国家级实验教学示范中心(东北师范大学),吉林长春130024

出　　处：《物理实验》2019年第9期15-19,共5页Physics Experimentation

基　　金：国家级大学生创新创业训练计划项目(No.201810200046)

摘　　要：用旋涂法和磁控溅射法在聚苯乙烯微球上包覆了银纳米半球壳.当光从不同方向照射时,样品表现出不同的颜色,该现象归因于银纳米结构的局域化表面等离子体共振效应.利用透射光谱和反射光谱研究了样品的光学性质,并用有限时域差分方法数值模拟了半球壳包裹的PS圆球模型的光谱,解释了非对称光学现象的物理机理.Silver semi-shells covered polystyrene spheres were fabricated with spin-coating and magnetron sputtering.The prepared nano structures showed different colors when illuminated in different directions.Such a phenomenon was attributed to the localized surface plasma resonance of the silver semi-shells.The transmission and reflection spectra were measured,and numerically simulated with finite difference time domain method.The underlying physics of the non-symmetric optical phenomenon were explained.

关 键 词：局域化表面等离子体 核/壳结构 漫反射光谱 

分 类 号：O539[理学—等离子体物理] O436.2[理学—物理]