研究目的
Investigating the design and simulation of a graphene-based broadband absorber in the terahertz range using the Laplace transform current density convolution finite difference time domain method.
研究成果
The proposed graphene-based absorber demonstrates near-unity absorption in the terahertz range, with absorption characteristics tunable by adjusting the chemical potential on the graphene. This design offers a promising approach for developing tunable broadband absorbers.
研究不足
The study focuses on the terahertz range and specific configurations of chemical potentials, which may limit the generalizability of the findings to other frequency ranges or configurations.
1：Experimental Design and Method Selection:
The study employs the Laplace transform current density convolution finite difference time domain (LTJEC-FDTD) method to simulate the graphene-based absorber.
2：Sample Selection and Data Sources:
The absorber design includes a graphene ribbon array and a graphene sheet separated by dielectric spacers.
3：List of Experimental Equipment and Materials:
The materials used include graphene, ZrO2 as the dielectric, and a perfect electric conductor (PEC) for grounding.
4：Experimental Procedures and Operational Workflow:
The FDTD spatial step of 75nm is used with specific chemical potentials applied to the graphene array and sheet to observe absorption variations.
5：Data Analysis Methods:
The absorbance is calculated based on the reflection and transmission coefficients.
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