Research On Graphene Hybrid Plasmonic Waveguide Restricted Transmission Device

With the rapid development of integrated optics,the requirements for the integration of integrated optical devices in this field are increasing.The optical waveguide structure based on the surface plasmon effect can effectively break the diffraction limit and greatly reduce the size of the integrated optical devices,thereby meeting the requirements of high integration.In recent years,many researchers have devoted themselves to this field and have achieved fruitful research results,but its performance still has room for continued improvement.Graphene is a three-dimensional material,and the hybrid plasmonic waveguide based on this can realize the excitation of multiple polarization states,broaden the applicable waveband of the waveguide,and provide more controllable dimensions to balance the restrictions between the constraints and the loss more flexibly relationship.This paper aims to study the limiting capacity and transmission loss of different types of graphene hybrid plasmonic waveguides under different structural parameters and material parameters,and to realize the excitation of different polarization states,and to further lay a solid foundation for the design of corresponding devices.In this paper,two types of graphene-based hybrid plasmonic waveguide structures are mainly studied.First,the cylindrical graphene mixed plasmonic waveguide structure is studied,the transmission characteristics of the TM mode in the structure are studied,and the structural parameters and material parameters of the waveguide are optimized according to the mode area,propagation distance and quality factor.The restricted transmission of radially polarized light increases the control dimension,reduces the size of the structure,enhances the limiting ability of the waveguide,and achieves overall performance optimization.On this basis,it is verified that the waveguide in the nearinfrared and terahertz bands also has excellent performance,and band broadening has been achieved.Then the excitation and transmission characteristics of the TE mode in the cylindrical graphene mixed plasmonic waveguide structure are studied.After fine-tuning the waveguide structure,the doublelayer graphene structure is adopted,and the structural parameters and material parameters of the waveguide are also optimized according to performance indicators.It supports the restricted transmission of rotatively polarized light,thereby realizing a cylindrical hybrid plasmonic waveguide with adjustable polarization state based on graphene with superior performance.Finally,in order to balance the relationship between limitation and loss more flexibly,a graphene hyperbolic metamaterial was introduced as the waveguide cladding,and a graphene hyperbolic metamaterial hybrid plasmon waveguide was designed to study the mode transmission characteristics of the structure.And analyze the law of the influence of different structural parameters and material parameters on the performance,and optimize the waveguide on this basis,and finally achieve extremely restrictive transmission.Through the research work in this paper,two graphene hybrid plasmonic waveguide structures are designed,and the restricted transmission of different polarization states is realized.On this basis,the influence of different structures and material parameters on the performance of the waveguide is studied,and a graphene hybrid plasmon waveguide structure with strong optical field confinement capability and considerable transmission distance is designed.Compared with the traditional waveguide structure,the control dimensions are increased.It is convenient to flexibly control the performance of the waveguide,broaden the applicable band,reduce the size and enhance the restriction ability,and has potential value in the fields of optical field control and integrated optics.