量子电子学报, 2013, 30 (2): 225, 网络出版: 2013-04-07
填充比对金属光栅与介质光栅激发表面等离子波的不同影响
Different influence of filling factor on surface plasmon polaritons of metallic or dielectric gratings
医用光学与生物技术 光栅 严格耦合波分析 表面等离子体波 medical optics and biotechnology grating rigorous coupled wave analysis surface plasmon polariton
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 polariton, SPP)波矢的有效折射率Neff与光栅填充比的关系,结果表明对于Au金属光栅结构,SPP的Neff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Neff随着介质光栅填充比的增大单调递增。
Abstract
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.
黄少茹, 鲁拥华, 王沛, 明海. 填充比对金属光栅与介质光栅激发表面等离子波的不同影响[J]. 量子电子学报, 2013, 30(2): 225. HUANG Shao-ru, LU Yong-hua, WANG Pei, MING Hai. Different influence of filling factor on surface plasmon polaritons of metallic or dielectric gratings[J]. Chinese Journal of Quantum Electronics, 2013, 30(2): 225.