激光与光电子学进展, 2019, 56 (6): 061301, 网络出版: 2019-07-30
基于时域有限差分法的石墨烯纳米带阵列多频滤波特性研究 下载: 1002次
Multi-Frequency Filtering Characteristics of Graphene-Nanoribbon Arrays Based on Finite Difference Time Domain Method
集成光学 石墨烯纳米带 多频滤波器 时域有限差分方法 表面等离子体 integrated optics graphene nanoribbons multi-frequency filters finite difference time domain method surface plasmon
摘要
基于石墨烯纳米带阵列的共振效应,提出了三层石墨烯纳米带阵列结构,研究了该阵列参数对复合结构的多频滤波特性的影响规律。利用时域有限差分(FDTD)法,讨论了费米能级、石墨烯带宽占比、外界折射率对滤波频率的影响。研究结果表明,增加费米能级能使谐振频蓝移,增加石墨烯带宽占比和外界折射率均使谐振频率红移,费米能级改变0.1 eV时,谐振频率的改变量超过5 THz。
Abstract
With the help of the resonance effect of graphene nanoribbon arrays, a three-layer graphene nanoribbon array is proposed. The influences of the various parameters of this array on the multi-frequency filtering characteristics of the composite structure are investigated. With the finite-difference time-domain (FDTD) method, the influences of Fermi level, graphene bandwidth ratio, and external refractive index on filter frequency are discussed. The research results show that the increase of Fermi level can make the resonant frequency blue shift, in contrast, the increase of graphene bandwidth ratio and external refractive index can both make the resonant frequency red shift. When Fermi level is changed by 0.1 eV, the resonant frequency can be changed by an amount of more than 5 THz.
阳胜, 曾春平, 肖驰, 周亚乔, 王昊, 马琨. 基于时域有限差分法的石墨烯纳米带阵列多频滤波特性研究[J]. 激光与光电子学进展, 2019, 56(6): 061301. Sheng Yang, Chunping Zeng, Chi Xiao, Yaqiao Zhou, Hao Wang, Kun Ma. Multi-Frequency Filtering Characteristics of Graphene-Nanoribbon Arrays Based on Finite Difference Time Domain Method[J]. Laser & Optoelectronics Progress, 2019, 56(6): 061301.