High-sensitivity plasmonic temperature sensor based on photonic crystal fiber coated with nanoscale gold film

Abstract

We demonstrate a photonic crystal fiber temperature sensor based on surface plasmon resonance and evaluate it using the finite element method. A temperature-sensitive material is injected into the central air hole of the photonic crystal fiber. The air hole is coated with nanoscale gold film. Six cores are formed by removing air holes in the second layer, which supports the core mode. The coupling between the core mode and the surface plasmon polariton mode occurs as the phase matching condition is satisfied. The average sensitivity and linearity become −2.15 nm/°C and 0.99991, respectively. The length of this fiber is only 1 mm. Our temperature sensor is competitive within the temperature sensor field.

Slow-Nonlinearity Assisted Supercontinuum Generation in a CS2-Core Photonic Crystal Fiber

“…where n() is the refractive index of CS 2 at the reference temperature of 20 o C at the wavelength , T  is the difference between the practical temperature T and the reference temperature 20 o C, dn/dT is the variation rate of the refractive index with respect to T, which is -7.91×10 -4 K -1 for CS 2 [28]. The refractive indices of silica affected by temperature are calculated by referring to the literature [29]. Fig.…”

Design and Computational Analysis of Dual Core Photonic Crystal Fiber Temperature Sensor based on Surface Plasmon Resonance

“…Then, gold (plasmonic material) is deposited outside of the PCF by chemical vapour deposition (CVD) technique [14]. The plasmonic material gold is characterized by the Drude-Lorentz model [15].…”

Temperature Sensor Based on Photonic Crystal Fiber Filled With Liquid and Silver Nanowires

“…Liu et al presented a same type sensor based on PCF coated with nanoscale gold film. By removing air holes in the second layer, the coupling between core mode and SP polariton (SPP) mode occurs easily, and the average sensitivity obtained is −2.15 nm/°C [19], but they are all based on the numerical simulations, and the coating operation is quite difficult to realize experimentally.…”

“…SPR technique owns extraordinary properties like label free, real-time and high resolutions down to 10 À7 RI units (RIUs) [16], which is not accessible to other sensing methods. Combining the advantages of PCF and SPR, many sensing devices have been very recently reported [12], [13], [17]- [19]. Hassani et al first designed a RI sensor and realize the detectable RI change of 10 À4 [17].…”