Acta Optica Sinica, Volume. 40, Issue 6, 0623002(2020)
Graphene Gap Plasmonic Waveguide for Deep-Subwavelength Transmission of Mid-Infrared Waves
This paper proposes a graphene gap waveguide structure comprising graphene-covered nanowires and graphene layers. The propagating properties of the fundamental mode and their dependence on the structural and material parameters are studied in detail by the finite element method. Results show that the nanowire radius, gap distance, nanowire permittivity, and chemical potential of graphene have a significant impact on the mode transmission properties. By optimizing parameters, the proposed structure can simultaneously achieve long-range propagation of graphene plasmons and deep subwavelength confinement of the mode field. The application of graphene plasmons for the deep-subwavelength transmission of mid-infrared waves offers a theoretical basis and guidance for the design and high-density integration of photonic devices beyond the diffraction limit.
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Da Teng, Kai Wang, Zhe Li, Qing Cao, Yanan Tang, Yongzhe Zhao, Ziyi Liu, Yunwen Zhang, Rongzhen Guo. Graphene Gap Plasmonic Waveguide for Deep-Subwavelength Transmission of Mid-Infrared Waves[J]. Acta Optica Sinica, 2020, 40(6): 0623002
Category: Optical Devices
Received: Jul. 23, 2019
Accepted: Sep. 9, 2019
Published Online: Mar. 6, 2020
The Author Email: Teng Da (tengda@zznu.edu.cn), Wang Kai (wangkai@mail.sitp.ac.cn), Tang Yanan (yntang2010@163.com)