研究目的
To propose and analyze a gold-plated photonic crystal fiber refractive index sensor based on surface plasmon resonance for high sensitivity in biological and chemical sensing.
研究成果
The proposed PCF-based SPR sensor with external gold coating achieves high sensitivity (up to 11000 nm/RIU wavelength sensitivity and 641 RIU?1 amplitude sensitivity) through structural optimization, making it suitable for practical biological and chemical sensing applications due to its simplicity and ease of fabrication.
研究不足
The study is based on simulations and lacks experimental validation; fabrication challenges such as precise coating of gold on external surfaces and practical implementation issues are not addressed. The sensor's performance is optimized for a specific refractive index range (1.390-1.395), which may limit broader applicability.
1：Experimental Design and Method Selection:
The study uses finite element method (FEM) for numerical simulation to analyze the sensor performance, based on theoretical models including Sellmeier formula for silica dispersion and Drude-Lorentz model for gold dielectric constant.
2：Sample Selection and Data Sources:
No physical samples are used; the analysis is purely computational with parameters such as gold film thickness, analyte refractive index, and air hole radii varied in simulations.
3：List of Experimental Equipment and Materials:
Software tools like COMSOL Multiphysics are used for FEM simulations; materials include silica for the fiber background and gold for the coating.
4：Experimental Procedures and Operational Workflow:
The sensor structure is modeled with specific geometric parameters (e.g., r0=
5：2 μm, r1=4 μm, r2=6 μm, Λ=2 μm, d=2 μm, tg=35 nm), and confinement loss is calculated under varying conditions to optimize performance. Data Analysis Methods:
Sensitivity is calculated using formulas for wavelength sensitivity (Δλpeak/Δna) and amplitude sensitivity, with resolution determined assuming a spectral resolution of 0.1 nm.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
