研究目的
Investigating photonic microcavity-enhanced magnetic plasmon resonance in metamaterials for high-quality refractive index sensing.
研究成果
The proposed cavity-coupled metamaterial sensor exhibits very high sensitivity and figure of merit due to the narrow linewidth, large modulation depth, and great magnetic field enhancement at the MP resonance. This suggests potential applications in biomedical and sensing fields.
研究不足
The study is theoretical and numerical, with experimental validation not yet conducted. The practical fabrication and measurement of the proposed metamaterials may present challenges.
1：Experimental Design and Method Selection:
The study involves the design of metamaterials consisting of a top periodic array of U-shaped metallic split-ring resonators (SRRs), a middle dielectric layer, and a bottom metallic backed plate. The MP resonance is coupled to the photonic microcavity mode to reduce radiative damping.
2：Sample Selection and Data Sources:
The metamaterials are designed with specific geometrical parameters and materials (silver SRRs, magnesium fluoride dielectric spacer, and silver plate on silica substrate).
3：List of Experimental Equipment and Materials:
Commercial software package (Comsol Multiphysics) based on the finite element method is used for calculations.
4：Experimental Procedures and Operational Workflow:
The cavity-coupled metamaterial sensor is normally illuminated by a plane wave with its electric field along the SRR base line. Reflection and transmission spectra are calculated.
5：Data Analysis Methods:
The sensitivity and figure of merit are calculated based on the reflection spectra to evaluate the sensing performance.
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