五层对称人工超常材料结构的表面等离子体激元

研究了由左手材料、负介电材料、常规介电材料所构成的几种五层对称结构表面等离子体激元的特性.讨论了表面等离子体激元的存在区域、色散关系、以及p和s偏振的表面色散曲线枝,发现表面模的性质强烈依赖于系统的组成材料及其组合方式|层数越多,表面色散曲线枝也越多,处在频率通带的表面极化模态也越多|在五层结构中有p和s两种偏振的表面等离子体激元,在共振时,可导致p波和s波强透射.此外,通过使用衰减全反射方法,探讨了激发并观察表面等离子体激元的可能性.

Surface Plasmon Polaritons of the Metamaterial Symmetric Five-layered Structures

The surface plasmon polaritons (SPPs) properties of symmetric five-layered structures composed of three kinds of materials:left-handed material (LHM),negative dielectric permittivity material (NDPM),and dielectric are investigated.The existence regions,dispersion relations,and excitation of the p and s polarized SPPs in several types of symmetric five-layered structures are studied in detail.It is shown that the properties of SPPs in different frequency regions are strongly dependent on the composite materials and their sequencing of the symmetric five-layered structures.It is also found that more layers lead to more surface dispersion branches,and more surface polarization modes in pass-band frequency.The intensified transmission can be realized when p and s polarized SPPs resonance.The possibility of exciting and observing SPPs by Attenuated Total Reflection (ATR) technique is also discussed.