研究目的
Investigating the possibilities of creating electronically controlled filters for subTHz and THz bands based on graphene meta-surfaces and multilayer structures, focusing on their dynamic tuning through external electric fields.
研究成果
Periodic layered microstructures of 'graphene–dielectric' type can be used to create broadband filters for subTHz and THz bands with planar construction, controllable by electric fields and tunable with small changes in graphene's Fermi energy level. The filters show potential for high-speed control and significant attenuation in non-transmission bands.
研究不足
The study is based on theoretical modeling and simulations, which may not fully capture all practical challenges in fabricating and operating such filters. The performance is dependent on the precise control of graphene's chemical potential and geometric dimensions.
1:Experimental Design and Method Selection:
The study involves mathematical modeling and electrodynamic calculations to investigate the transmission characteristics of graphene-based meta-surfaces and multilayer structures. Computational methods include modified finite element method (FEM), finite differences methods in the domain time (FTDT), periodic method of moments (MoM), implemented in commercial packages like HFSS, ADS, MSC, Microwave Office, Microwave Studio, FEKO, LabVIEW.
2:Sample Selection and Data Sources:
The study uses theoretical models of graphene meta-surfaces and multilayer structures, with specific geometric dimensions and material properties.
3:List of Experimental Equipment and Materials:
Graphene rings and nano-tapes, dielectric substrates (photopolymer with ε = 2.4), and computational software packages.
4:4), and computational software packages.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Simulation of electromagnetic wave interactions with graphene structures, calculation of transmission coefficients, and analysis of electric field distributions at resonant frequencies.
5:Data Analysis Methods:
Analysis of frequency dependencies of transmission coefficients and electric field distributions to understand the plasmon-induced radiation effects and tuning capabilities.
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