石墨烯混合等离子体波导光子轨道角动量产生及转换器设计  

Design of graphene hybrid plasmonic waveguide device for the generation and conversion of photonic orbital angular momentum

作　　者：肖之伟 陈竞翔 江莹 曹振洲[1,2,3] 杨春勇[1,2,3] XIAO Zhiwei;CHEN Jingxiang;JIANG Ying;CAO Zhenzhou;YANG Chunyong(South-Central Minzu University,a.College of Electronics and Information Engineering;b.Hubei Engineering Research Center of Intelligent IOT Technology;c.Hubei Key Laboratory of Intelligent Wireless Communications,Wuhan 430074,China)

机构地区：[1]中南民族大学电子信息工程学院,武汉430074 [2]中南民族大学智能物联技术湖北省工程研究中心,武汉430074 [3]中南民族大学智能无线通信湖北省重点实验室,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2024年第3期378-383,共6页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(62171487);中央高校基本科研业务费专项资金资助项目(YZF20001)。

摘　　要：为满足现代社会对通信容量日益增长的需求,设计了一种基于石墨烯混合等离子体波导的可重构光子轨道角动量产生及转换器,利用时域有限差分法对器件的性能进行了仿真分析.仿真结果表明:石墨烯费米能级为0 eV时,该装置实现了拓扑荷由+1向−1或者−1向+1的光子轨道角动量的转换,转换效率达到93.6%;石墨烯费米能级为0.9 eV时,该装置可以将线偏振光转换为携带轨道角动量的涡旋光,此时该器件还可以用于识别拓扑荷为±1的涡旋光.A reconfigurable photonic orbital angular momentum generator and converter based on graphene hybrid plasma waveguide was designed to meet the increasing demand for communication capacity in modern society.The performance of the device was simulated by the time-domain finite-difference method.The simulation results showed that when the Fermi level of graphene was 0 eV,the device realized the photonic orbital angular momentum conversion of topological charge from+1 to−1 or−1 to+1 with a conversion efficiency of up to 93.6%.When the Fermi level of graphene was 0.9 eV,the device could convert the linearly polarized light to vortex light carrying orbital angular momentum.In this case,the device can also be used to identify vortex light with topological charge±1.

关 键 词：光子轨道角动量 石墨烯 混合等离子体波导 双折射效应 模式耦合 

分 类 号：TN814[电子电信—信息与通信工程]