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

Abstract

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/°C. It has good linearity (R 2 = 0.99803), the resolution of 1.1 × 10−3 °C, and the amplitude sensitivity of 0.1008 °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.

High sensitivity and wide detection range temperature and refractive index photonic crystal fiber sensor

“…According to the numerical simulation results of filling of TSL, the sensitivity is relatively high among other reported temperature sensors [18][19][20][28][29][30][31]. The results indicate that the PCF-SPR temperature sensor in this structure has a certain universality, but there is still a difference in the temperature detection range.…”

“…When the wavelength detection range is 600 nm to 800 nm, its maximum sensitivity is 5100 nm RIU −1 in the RI range from 1.35 to 1.40 and 1.2 nm • C −1 in the range of 20 • C-60 • C, respectively [19]. Gao et al proposed a side-polished PCF-SPR temperature sensor, where the maximum sensitivity of 7.82 nm • C −1 is achieved in the range from 0 • C to 60 • C, the working wavelength is a range of 1800-2500 nm [20]. Although the above sensors have made some progress, their temperature sensitivity and detection wavelength range need to be improved.…”

Highly sensitive methane gas sensor based on Au/UVCFS films coated D-shaped photonic crystal fiber

“…Gradually, the number of SPR based optical fiber sensing elements in actual production has increased. Due to the miniature size and excellent transmission characteristics, photonic crystal fibers (PCFs) were widely used as SPR carriers [5][6][7]. Photonic crystal is an artificial periodic dielectric structure with photonic band gap characteristics [8].…”