三层不对称人工电磁材料界面处表面等离子体激元的理论研究  

Theoretical Study on Properties of Surface Plasmon Polaritons at Interfaces of Metamaterials with Three-Layered Asymmetric Structures

作　　者：曹迪[1] 张惠芳[1] 陶峰[1] 

机构地区：[1]上海大学理学院物理系,上海200444

出　　处：《光学学报》2008年第8期1601-1610,共10页Acta Optica Sinica

摘　　要：从p和s偏振出发,研究了由常规材料/左手材料/负介电常数材料、及常规材料/左手材料/负磁导率材料这两种三层不对称结构界面上表面等离子体激元(Surface plasmon polaritons,SPPs)的存在区域、色散曲线及其激发。观察到表面等离子体激元的性质强烈地依赖于人工电磁材料的组成参量,例如介质板的厚度和等离子体的频率。最后,使用衰减全反射(Attenuated total reflection,ATR)技术,探究了激发和观察表面等离子体激元的可能性,并针对p和s偏振两种情况计算了衰减全反射光谱。Three kinds of artificial composite materials are involved： left-handed material （LHM）, negative dielectric permittivity material （NDPM） and negative magnetic permeability material （NMPM）. For the p- and s-polarizations, the properties of surface plasmon relations and excitation of SPPs are investigated dielectric/LHM/NDPM and dielectric/LHM/NMPM polar/tons （SPPs） including the existence regions, dispersion in detail in two three-layered asymmetric structures, i.e., It is found that the properties of SPPs in different frequency regions are strongly dependent on the parameters of composite materials, such as, the slab thickness and plasma frequency for NDPM or LHM. The possibiIity of exciting and observing SPPs is discussed by attenuated total reflection （ATR） technique. The ATR spectrum is also calculated for p- and s-polarizations cases at these interfaces.

关 键 词：光学材料 人工电磁材料 表面等离子体激元 衰减全反射方法 不对称界面 

分 类 号：O441.4[理学—电磁学]