研究目的
Investigating the modal properties and modulation characteristics of the fundamental gap mode supported by nanowire based symmetrical IMI graphene hybrid plasmonic waveguide.
研究成果
The proposed graphene hybrid plasmonic waveguide demonstrates high extinction ratio and large modulation bandwidth simultaneously at the telecommunication wavelength, with a very small energy consumption per bit and deep subwavelength mode size. This suggests its potential for highly dense and compact device integration in photonic integrated circuits.
研究不足
The study focuses on theoretical analysis and simulation, with practical implementation challenges not fully explored. The performance variation with respect to the alteration of operating wavelength and cross-sectional geometry suggests potential limitations in real-world applications.
1：Experimental Design and Method Selection:
The study employs the finite element method to analyze the modal properties and modulation characteristics of the proposed waveguide.
2：Sample Selection and Data Sources:
The waveguide consists of silicon (Si) nanowires symmetrically located in silica (SiO2) substrate around a central gold (Au) nanowire, with graphene-hBN-graphene layers placed in the gap regions.
3：List of Experimental Equipment and Materials:
COMSOL Multiphysics is used for simulation, with materials including Au, Si, SiO2, and hBN.
4：Experimental Procedures and Operational Workflow:
The eigen mode analysis is carried out using E field based full-vectorial finite element method, with a cylindrical perfectly matched layer (PML) as the termination of computational domain.
5：Data Analysis Methods:
The propagation length and effective mode area are calculated to quantify the electric field localization in the dielectric gap region.
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