研究目的
Investigating the optical and sensing properties of a plasmonic sensing device based on an asymmetric long-range surface plasmon polaritons waveguide for sensing applications.
研究成果
The proposed plasmonic sensing device based on an asymmetric long-range surface plasmon polaritons waveguide demonstrates high sensitivity and a low limit of detection, making it suitable for a wide range of sensing applications in biochemistry, environmental science, food safety, and medicine.
研究不足
The study is limited by the tradeoff between coupling efficiency and propagation loss for the sensing waveguide, and the need for careful optimization of the gold strip dimensions to balance sensitivity and sensing length.
1：Experimental Design and Method Selection:
The study utilized a finite element method (FEM) embedded in the COMSOL Multiphysics software to investigate the optical properties of the proposed long-range surface plasmon polariton waveguides.
2：Sample Selection and Data Sources:
The sensing structure consists of a microchamber and a gold strip with a cover layer, located on a dielectric supported by a silicon substrate.
3：List of Experimental Equipment and Materials:
A gold strip of varying widths and heights, Te?on as the cladding dielectric, and a silicon substrate were used.
4：Experimental Procedures and Operational Workflow:
The optical and sensing properties were studied by varying the dimensions of the gold strip and the refractive index of the analyte.
5：Data Analysis Methods:
The sensitivity and limit of detection were calculated based on the variations in output power and refractive index.
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