This paper proposes a D-shaped high-sensitivity photonic crystal fiber low refractive index sensor based on surface plasmon resonance.The D-shaped photonic crystal fiber structure is easier to coat,and it is convenient to fill the analyte.The use of an open gold-coated structure can excite more plasmons.The finite element method was utilized to numerically simulate its structure,and the effects of structural parameters such as air holes,opening diameter,and coating thickness on the sensor performance were investigated.According to the numerical simulation results,the structure is optimized.When the refractive index range of the analyte is 1.2～1.29,the maximum sensitivity of the sensor can reach 17 000 nm/RIU when the refractive index of the analyte is 1.29,and the resolution can reach 6.0×10-6 RIU.
关键词
表面等离子体共振/光子晶体光纤/折射率传感器
Key words
surface plasmon resonance/photonic crystal fibers/refractive index sensor
维普
万方数据