研究目的
Investigating the transmission characteristics and refractive index sensing capabilities of a HRR-coupled MIM waveguide structure.
研究成果
The HRR-coupled MIM waveguide structure demonstrated tunable transmission characteristics and high sensitivity to refractive index changes, making it suitable for applications in nanosensors and optoelectronic devices. The addition of a rectangular resonator enabled the achievement of double PIR windows, further enhancing its functionality.
研究不足
The study is based on numerical simulations, and practical implementation may face challenges related to fabrication precision and material properties. The sensitivity and performance may vary with real-world conditions.
1：Experimental Design and Method Selection:
The study utilized numerical simulations based on the two-dimensional finite difference time domain (2D FDTD) method with perfectly matched layers (PML) in x and y directions to investigate the transmission characteristics of the HRR-coupled MIM waveguide structure.
2：Sample Selection and Data Sources:
The structure consisted of a MIM waveguide coupled with a half-ring resonator (HRR) and optionally a rectangular resonator. The materials used were silver (background) and air (dielectric).
3：List of Experimental Equipment and Materials:
The simulations were performed using computational tools, with the frequency-dependent complex relative permittivity of silver defined by the Johnson and Christy model.
4：Experimental Procedures and Operational Workflow:
The transmission spectra were analyzed by varying the geometrical parameters of the HRR and the coupling distances between components. The refractive index sensitivity was tested by changing the dielectric material inside the resonator.
5：Data Analysis Methods:
The transmission characteristics were analyzed to identify resonance dips and peaks, and the sensitivity to refractive index changes was quantified.
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