研究目的
Investigating the scattering of electromagnetic field by a thin dielectric disk sandwiched between two graphene covers in the THz range, focusing on the resonances and the power radiated by an elementary dipole.
研究成果
The study demonstrates that a thin dielectric disk with graphene covers acts as a complex open resonator in the THz range, supporting both low-frequency plasmon modes and high-frequency dielectric-disk modes. The plasmon resonance can be tuned by varying the graphene's chemical potential, offering potential applications in THz devices.
研究不足
The study is limited to numerical simulations and theoretical modeling, without experimental validation. The analysis assumes specific conditions for the graphene and dielectric properties, which may not cover all practical scenarios.
1：Experimental Design and Method Selection:
The study uses the integral equation technique to model the scattering of electromagnetic waves by a thin dielectric disk with graphene covers. The generalized boundary condition is applied to derive dual integral equations for the Hankel transforms of the tangential electric and magnetic field components.
2：Sample Selection and Data Sources:
The scatterer is a thin circular dielectric disk with graphene covers, excited by an elementary magnetic dipole placed above the disk.
3：List of Experimental Equipment and Materials:
The study involves numerical simulations without specific physical equipment, focusing on mathematical modeling.
4：Experimental Procedures and Operational Workflow:
The derived integral equations are discretized and solved numerically, ensuring convergence. The power radiated by the dipole is computed and plotted as a function of frequency.
5：Data Analysis Methods:
The numerical results are analyzed to identify resonances and the behavior of the radiated power, comparing scenarios with and without graphene covers.
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