High sensitivity plasmonic temperature sensor based on a side-polished photonic crystal fiber

A high sensitivity plasmonic temperature sensor based on a side-polished photonic crystal fiber is proposed in this work. In order to achieve high sensitivity and high stability, the gold layer is coated on the side-polished photonic crystal fiber to support surface plasmon resonance. The mixture of ethanol and chloroform is used as the thermosensitive liquid. The performances of the proposed temperature sensor were investigated by the finite element method (FEM). Simulation results indicate that the sensitivity of the temperature sensor is as high as 7.82 nm/degrees C. It has good linearity (R (2) = 0.99803), the resolution of 1.1 x 10(-3) degrees C, and the amplitude sensitivity of 0.1008 degrees C-1. In addition, the sizes of the small air hole and polishing depth have little influence on the sensitivity. Therefore, the proposed sensor shows a high structure tolerance. The excellent performance and high structure tolerance of the sensor make it an appropriate choice for temperature measurement.

Automated summary

This work proposes a high sensitivity plasmonic temperature sensor based on a side-polished photonic crystal fiber. A gold layer is coated on the fiber to support surface plasmon resonance, achieving high sensitivity and stability. The sensor uses a mixture of ethanol and chloroform as the thermosensitive liquid. Simulation results show that the sensor has high sensitivity, good linearity, and high structure tolerance, making it suitable for temperature measurement.