负折射率介质光纤的导模异常特性分析  

Abnormal Characteristics of Guided Modes in a Fiber Formed by a Medium with Negative-refractive Index

作　　者：何金龙[1] 沈林放[1] 何赛灵[1] 阮智超[1] 

机构地区：[1]浙江大学国家光学仪器重点实验室光与电磁波研究中心,浙江杭州310027

出　　处：《光子学报》2004年第11期1327-1330,共4页Acta Photonica Sinica

基　　金：国家自然基金项目(批准号:60277018);国家自然基金重点项目(批准号:90101024)

摘　　要：对芯层为负折射率介质,敷层为普通介质的光纤的导模进行了研究,并对芯层与敷层介电常数比值(ξ)和磁导率比值(η)变化对导模色散特征的影响进行分析分析表明负折射率光纤具有许多不同于常规光纤的反常特征,如存在表面波模,存在TM00模和TE00模以及存在多个单模传输模式和单模传输区间等同时对负折射率介质光纤的单模传输条件进行了分析。The guided modes in a step index fiber formed by a core with negative refractive index and a usual dielectric cladding are studied. The influences of the permittivity ratio (ξ; for the core and the cladding)and the permeability ratio (η) on the guided waves are investigated. Some abnormal properties of the guided waves in the fiber are discussed, such as the existence of surface modes, the existence of TE 00 mode and TM 00 mode, several single mode regions. The condition of single mode propagation is analyzed, and various single mode propagation properties are discussed for different values of ξ and η.

关 键 词：负折射率介质 左手材料 光纤 导模 

分 类 号：TN25[电子电信—物理电子学]