研究目的
Investigating the sensitivity enhancement of a concave shaped optical fiber refractive index sensor covered with multiple Au nanowires.
研究成果
The use of AuNWs can effectively enhance the sensitivity of the sensor and the structural parameters such as D, dn, and s of CSRIS are the key factors to achieve a high sensitivity. The sensing response of the designed CSRIS shows that the device can be used in various chemical and biological sensing.
研究不足
The main challenges of complexity in fabrication, and filling the hole with selective analytes and the nanowire, still remain.
1：Experimental Design and Method Selection:
The sensor is designed and analyzed using the finite element method (FEM) technique based on COMSOL Multiphysics. The work illustrates the comparative analysis of CSRIS in which two types of sensors, one covered with Au thin film and the other covered with multiple AuNWs, are designed.
2：Sample Selection and Data Sources:
The proposed sensor is designed by using a standard single-mode fiber with core/cladding diameter of 9/125 μm.
3：List of Experimental Equipment and Materials:
The sensor is characterized for two types of sensing structures coated with gold (Au) film and Au nanowires (AuNWs), respectively.
4：Experimental Procedures and Operational Workflow:
The influence of structural parameters such as the distance (D) of the concave shaped channel (CSC) from the core, the diameter of the nanowire (dn) and the size (s) of the CSC are investigated.
5：Data Analysis Methods:
The simulation results show that the sensitivity of the designed sensor can be greatly enhanced by covering the CSC with multiple AuNWs instead of Au film.
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