研究目的
Investigating the sensing properties of a plasmonic metal-insulator-metal waveguide with a single stub including defects for applications in refractive index and temperature sensors.
研究成果
The proposed plasmonic MIM waveguide with a single stub including silver nanorod defects shows high sensitivity for refractive index and temperature sensing, with potential applications in highly integrated optical circuits. The sensitivity can be further improved by optimizing structural parameters.
研究不足
The study is based on numerical simulations, and practical implementation may face challenges in fabricating the precise nanostructures and integrating them into optical circuits.
1：Experimental Design and Method Selection:
The study employs a finite element method (FEM) with perfect matched layers (PMLs) absorbing boundary condition to numerically investigate the proposed sensor's performance.
2：Sample Selection and Data Sources:
The sensor consists of a metal-insulator-metal waveguide with a single stub including several silver nanorod defects.
3：List of Experimental Equipment and Materials:
The materials include silver and air, with structural parameters such as the length of stub (h), radius of defect rod (r), and the number of defects (N) varied to study their effects.
4：Experimental Procedures and Operational Workflow:
The transmittance spectrum is calculated covered 400-6000 nm in step of 1 nm, and the complex relative permittivity of silver is taken from a reference.
5：Data Analysis Methods:
The sensitivity is calculated based on the shift of resonant peak wavelength of transmittance.
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