摘要
对比研究了石墨烯包裹的纳米线与金属包裹的纳米线亚波长传输特性。针对单线和双线两个结构,采用有限元方法研究了不同频率和尺寸下最低阶模式的场分布和传输特性。结果表明,当金属层厚度大于其趋肤深度时,石墨烯包裹的纳米线的基模光场约束性能更好;当金属层厚度远小于趋肤深度时,金属包裹的纳米线和石墨烯包裹的纳米线亚波长传输性能相当。相关研究结果可为等离激元材料的选择提供参考,在亚波长光子器件领域有潜在的应用价值。
In this study,a comparative investigation of the subwavelength transmission properties of graphene-and metal-coated nanowires is conducted.By using the finite element method,the modal field distribution and transmission properties of the lowest-order modes are investigated based on the frequency and structural dimensions for single nanowires and nanowire dimers.The results showed that when the thickness of the metal layer is larger than the skin-depth,graphene-coated nanowires exhibit better fundamental modal field confinement.However,when the thickness of the metal layer is far smaller than the skin-depth,the subwavelength transmission properties of the metal-coated nanowires are comparable to those of graphene-coated nanowires.These results will provide a reference for choosing plasmonic materials and have potential applications in subwavelength photonic devices.
作者
王云成
滕达
胡聚源
王菲菲
徐田子
阮从燕
李益强
赵英豪
欧锦锦
王凯
Wang Yuncheng;Teng Da;Hu Juyuan;Wang Feifei;Xu Tianzi;Ruan Congyan;Li Yiqiang;Zhao Yinghao;Ou Jinjin;Wang Kai(College of Physics and Electronic Engineering,Zhengzhou Normal University,Zhengzhou,Henan 450044,China;Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第9期341-348,共8页
Laser & Optoelectronics Progress
基金
河南省高等学校重点科研项目计划(21A140029)
郑州师范学院青年骨干教师培养项目(QNGG-20774)
郑州师范学院科研启动专项经费
郑州师范学院开放研究基金
郑州师范学院大学生创新性实验计划(DCZ2019015)
郑州师范学院大学生科研创新基金(2019DC003)。
关键词
光学器件
波导
红外波
纳米线
optical devices
waveguide
infrared wave
nanowires
