研究目的
To design and fabricate a graphene covered on square-ring structure to achieve narrow band absorption of three peaks in the infrared band and analyze the differences between simulation and experimental results.
研究成果
The graphene/square-ring structural device achieves three narrow band absorption peaks in the infrared band. The study provides insights into the causes of differences between simulation and experimental results and proposes solutions to improve the experimental design for dynamic control characteristics.
研究不足
The dynamic control characteristics of the graphene device are not observed in the experiment due to the graphene being covered on a gold layer with better electrical performance. Differences between experimental and simulation results are attributed to grid discrete calculation domain, graphene damage and overlap, and film thickness inaccuracies.
1：Experimental Design and Method Selection:
The device is composed of graphene, Au and SiO2, designed to achieve narrow band absorption in the infrared band.
2：Sample Selection and Data Sources:
Graphene is grown by CVD on copper foil, transferred to a square-ring metal/dielectric/metal periodical structure deposited on silicon wafer.
3：List of Experimental Equipment and Materials:
Includes electron beam evaporation deposition method, plasma enhance chemical vapor deposition method, ion beam etching method, and Fourier transform infrared spectroscopy for measurement.
4：Experimental Procedures and Operational Workflow:
Fabrication of the square-ring device, transfer of graphene using standard wet transfer method, and measurement of absorption rates.
5：Data Analysis Methods:
Simulation of electromagnetic responses and absorption using FEM software (COMSOL Multiphysics), comparison with experimental results.
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