基于表面等离激元共振具有高消光比的光子晶体光纤偏振滤波器  

Photonic Crystal Fiber Polarization Filter with High Extinction Ratio Based on Surface Plasmon Resonance

作　　者：钟文杰 唐锦 蔡旭红[1] 李邵辉[1] ZHONG Wenjie;TANG Jin;CAI Xuhong;LI Shaohui(Department of Physics,Shantou University,Shantou 515063,Guangdong,China)

机构地区：[1]汕头大学物理系,广东汕头515063

出　　处：《汕头大学学报（自然科学版）》2024年第3期3-11,F0002,共10页Journal of Shantou University：Natural Science Edition

摘　　要：本文提出一种新型光子晶体光纤偏振滤波器,利用有限元方法对其偏振滤波特性进行了模拟分析.该滤波器使用一矩形镀金空气孔取代常用的圆形空气孔,模拟结果证明这种结构可以改变纤心中传输的两个正交偏振模式在金属表面所激发的表面等离激元共振波长之间的间隔及耦合效率,从而在一个偏振模式的约束损耗可忽略不计的情况下,另外一个偏振模式具有较大的约束损耗,实现偏振滤波.该设计思想不仅适应于本文的光子晶体光纤偏振滤波器,也可应用于其它光纤结构.A novel photonic crystal fiber polarization filter with gold-coated air hole is proposed,and its polarization filtering characteristics are analyzed by using finite element method.The designed structure uses a rectangular gold coated air hole instead of the conventional circular air hole,and the simulation results demonstrate that this structure can enlarge the interval of the SPP resonant wavelengths of the two orthogonal modes and change their coupling efficiency,thereby reducing the confinement loss of the wanted polarization mode as low as negligible,while keeping a higher confinement loss of the unwanted polarization mode.The design is not only suitable for our fiber polarization filter,but also can be applied to other fiber filter structures.

关 键 词：光子晶体光纤 偏振滤波器 表面等离子共振 

分 类 号：TN253[电子电信—物理电子学]