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Refractive Index and Temperature Sensor of Micro-groove Photonic Crystal Fiber Based on Surface Plasmon Resonance

机译：Refractive Index and Temperature Sensor of Micro-groove Photonic Crystal Fiber Based on Surface Plasmon Resonance

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摘要

A micro-groove photonic crystal fiber sensor based on surface plasmon resonance (SPR) is proposed to simultaneously detect the refractive index and temperature of liquid. The sensor structure has three air holes and a micro-groove. The gold film was deposited on the micro-groove for refractive index measurement. The gold film was deposited in the air hole on the right side and filled with polydimethylsiloxane (PDMS) for temperature measurement. The finite element method is used to analyze the sensor characteristics. The numerical results show that the two channels of measuring refractive index and temperature do not interfere, reducing the complexity of two-parameter sensor measurement. When the refractive index of the liquid is in the range of 1.34-1.42 and the temperature is in the range of 0-100 degrees C, the maximum spectral sensitivity of the sensor is 14300 nm/RIU and 6.4 nm/degrees C, respectively. The results also show that the sensor's performance is not sensitive to the change of structural parameters. Therefore, the sensor is easy to manufacture. This high-sensitivity sensor based on micro-groove photonic crystal fiber and surface plasmon resonance has excellent potential in biochemical detection, environmental monitoring, and medical sensing.

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