银纳米结构二聚体中的等离激元感应透明  

Plasmon-induced transparency in Ag nanostructures dimer

作　　者：张杰[1] 马平平[1] 刘焕焕[1] 张静[1] 徐永刚[1] 王江[1] 张梦桥 李永放[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2016年第4期33-37,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(11474191)

摘　　要：设计了由对称性破缺的银纳米圆环构成的二聚体,应用有限元方法系统研究了该二聚体在光场作用下的吸收特性。结果表明,在光场作用下的对称性破缺银纳米圆环二聚体中可以实现等离激元感应透明(PIT)效应。通过改变圆环的偏心距、两环之间距离和右侧环绕z轴逆时针旋转角度可以实现对PIT效应的有效调控。PIT效应产生机理是由于左侧环的偶极明模受到右侧环暗模激发导致了偶极明模分裂,分裂的两个偶极明模间的相消干涉进而产生了PIT效应。The nanoring dimer structures consisting of a pair symmetry-broken Ag rings is proposed and its absorption properties are investigated using the 3Dfinite element method.The results show that the Ag nanoring dimer structures can achieve plasmon-induced transparency（PIT）.The PIT effect can be regulated and controlled by alter the gap between two naorings the offset of nanoring and rotation angle of right nanoring around the z axis counterclockwise.PIT effect mechanism is due to the bright mode stimulated by the dark mode,and the destructive interference between split bright modes results in the PIT effect generation.

关 键 词：纳米圆环二聚体 等离激元感应透明 相消干涉 

分 类 号：O433.5[机械工程—光学工程]