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中文摘要：
采用严格耦合波理论求解了不同填充比的金属光栅与金属平面覆盖介质光栅在角度调制下的共振衰减反射谱，以及它们在表面等离子体共振时的空间场分布，并对结果进行了对比分析。通过数值计算分析了金属表面等离子体波（Surface plasmon polaxiton，SPP）波矢的有效折射率Nee与光栅填充比的关系，结果表明对于Au金属光栅结构，SPP的Nee随着光栅填充比增加并无明显变化；而对于金属平面覆盖介质光栅结构，SPP的Nee随着介质光栅填充比的增大单调递增。
英文摘要：
Properties of the attenuated reflection and surface plasmon resonance （SPR） field distributions of both metallic and dielectric gratings placed on metal films were analyzed by using the rigorous coupled wave analysis. Relations between the gratings＇ filling factors and the effective index（Neff） of the surface plasmon polaritons（SPPs） propagating on both structures were investigated. The results show that the increase of filling factor can only cause trivial changes to Neff of the SPPs on gold gratings, but distinct increments to that of the dielectric gratings.
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