研究目的
Investigating the performance of a microchannel incorporated single mode fiber plasmonic sensor coated with ITO-TiO2 bilayer for sensing applications over a wide refractive index range.
研究成果
The proposed SMF SPR sensor with a microchannel and ITO-TiO2 bilayer coating achieves high sensitivity and a wide response range, making it suitable for applications in chemical laboratories, food industry, and environmental analysis.
研究不足
The study is based on simulation results; practical fabrication and testing may present challenges not accounted for in the simulation.
1：Experimental Design and Method Selection:
The sensor design involves a side polished SMF with a microchannel incorporated along the sensing length, coated with ITO and TiO2 layers. The performance was analyzed using finite element method-based simulation software Comsol Multiphysics.
2：Sample Selection and Data Sources:
A SMF with core/cladding diameter 8/70 μm was polished to a D shape with depth 7 μm from the outer core boundary. A microchannel of diameter 10 μm was engraved in the polished surface.
3：List of Experimental Equipment and Materials:
SMF, ITO, TiO2, Comsol Multiphysics software.
4：Experimental Procedures and Operational Workflow:
The microchannel was coated with a 50 nm ITO layer followed by 50 nm TiO2 layer. The analyte to be sensed is placed inside the microchannel as well as on the top of the polished surface.
5：Data Analysis Methods:
The sensitivity of the sensor was calculated by monitoring the shift of the resonance wavelength with change in analyte RI.
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