Work

Theoretical Analysis of Terahertz Dielectric–Loaded Graphene Waveguide

Year: 2021

Type: article

Abstract: The waveguiding of terahertz surface plasmons by a GaAs strip-loaded graphene waveguide is investigated based on the effective-index method and the finite element method. Modal properties of the effective mode index, modal loss, and cut-off characteristics of higher order modes are investigated. By modulating the Fermi level, the modal properties of the fundamental mode could be adjusted. The accuracy of the effective-index method is verified by a comparison between the analytical results and numerical simulations. Besides the modal properties, the crosstalk between the adjacent waveguides, which determines the device integration density, is studied. The findings show that the effective-index method is highly valid for analyzing dielectric-loaded graphene plasmon waveguides in the terahertz region and may have potential applications in subwavelength tunable integrated photonic devices.

Source: Nanomaterials

DOI: 10.3390/nano11010210

Authors: Da Teng, Kai Wang

Institutions: Zhengzhou Normal University, Chinese Academy of Sciences, Shanghai Institute of Technical Physics

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,376

Funder: China Postdoctoral Science Foundation