研究目的
To compare the sensitivities of optical sensors based on surface plasmonic waves and surface waves in a planar surface waveguide, both excited in the Kretschmann scheme, and to propose methods for increasing the sensitivity of sensors based on a surface waveguide.
研究成果
The study demonstrates that sensors based on multilayer surface waveguides can achieve higher sensitivity than those based on surface plasmonic waves. The proposed methods for increasing sensitivity involve reducing absorption in the waveguide and optimizing film thicknesses. The study also estimates the required fabrication accuracy and dimensions for workable sensors.
研究不足
The study is theoretical and relies on numerical calculations. The practical implementation of the sensors may face challenges related to the fabrication accuracy of film thicknesses and the dimensions of the sensors.
1：Experimental Design and Method Selection:
The study is based on the theory of reflection of a limited light beam from a plane-layered structure, examining surface plasmonic waves and surface waves in a planar surface waveguide excited in the Kretschmann scheme.
2：Sample Selection and Data Sources:
The study uses theoretical models and numerical calculations to compare the sensitivities of the sensors.
3：List of Experimental Equipment and Materials:
The study involves the use of gold films and multilayer surface waveguides with specific refractive indices and thicknesses.
4：Experimental Procedures and Operational Workflow:
The study involves numerical optimization of film thicknesses to achieve the sharpest reflection minimum.
5：Data Analysis Methods:
The study uses numerical methods to analyze the angular distribution of the reflection coefficient and to estimate the sensitivity of the sensors.
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