研究目的
Investigating the design and functionality of a graphene-based dual-band bandstop filter in the infrared frequency range, focusing on its tunability and application in optical communication systems.
研究成果
The paper demonstrates a plasmonic tunable DB-BSF in the IR frequency range, where the center frequency of each stopband can be independently adjusted with diverse applied bias voltages upon different lengths of graphene resonators. This offers an active approach to tune the DB-BSF features, indicating a broad application prospect in ultra-compact optical integrated circuits and devices.
研究不足
The study is limited to theoretical and simulation-based analysis without experimental validation. The practical implementation may face challenges related to the fabrication of graphene-based components and the precise control of bias voltages.
1：Experimental Design and Method Selection:
The study involves the design of a graphene-based dual-band bandstop filter (DB-BSF) using a graphene waveguide and two graphene-ribbon resonators on an Al2O3/Si substrate. The methodology includes theoretical modeling based on the Kubo formula for graphene surface conductivity and simulation of the filter's performance under varying bias voltages.
2：Sample Selection and Data Sources:
The samples include graphene ribbons and an Al2O3/Si substrate. Data is sourced from simulations and theoretical calculations based on the properties of graphene and the substrate materials.
3：List of Experimental Equipment and Materials:
Graphene waveguide, graphene ribbons, Al2O3/Si substrate, bias voltage sources.
4：Experimental Procedures and Operational Workflow:
The procedure involves applying different bias voltages to the graphene ribbons to adjust the Fermi level, thereby tuning the filter's stopband frequencies. The operational workflow includes simulation of the filter's transmission characteristics under various conditions.
5：Data Analysis Methods:
Analysis involves evaluating the transmission coefficients (S21) of the filter to determine the stopband frequencies and their tunability with applied bias voltages.
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