研究目的
To realize the double-mode absorption in a double-defect photonic crystal with one graphene multilayer, exploring its tunability and absorption characteristics.
研究成果
The study successfully demonstrates the achievement of double-mode absorption in a double-defect photonic crystal with one graphene multilayer. The modes can be independently tuned by adjusting the chemical potential of graphene and the size of the defect, offering flexibility in applications such as dual-λ lasing and frequency conversion. The research highlights the potential of graphene-based photonic crystals in terahertz wave detection and modulation.
研究不足
The study focuses on theoretical simulation and does not address practical fabrication challenges or the quality control of graphene layers.
1：Experimental Design and Method Selection:
The study employs the method of rigorous coupled-wave analysis (RCWA) to simulate the dielectric multilayer structure, achieving transmittance and reflectance through accumulating forward- and backward-diffraction efficiencies.
2：Sample Selection and Data Sources:
The defective photonic crystal absorber contains a graphene multilayer and one internal defect cavity formed by dielectric multilayers.
3：List of Experimental Equipment and Materials:
Graphene monolayer, SiO2, and Si are used with specified permittivities and thicknesses.
4：Experimental Procedures and Operational Workflow:
The simulation involves varying parameters such as the chemical potential of graphene, the size of the defect, and the period of photonic crystal to observe changes in absorption modes.
5：Data Analysis Methods:
The absorbance is calculated through the relationship A = 1 ? T ? R, where T and R are transmittance and reflectance, respectively.
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