Open AccessHighly sensitive sensing of a magnetic field and temperature based on two open ring channels SPR-PCF
Author(s) -
Dongying Wang,
Wanlai Zhu,
Zao Yi,
Guolu Ma,
Xiang Gao,
Bo Dai,
Yang Yu,
Guori Zhou,
Pinghui Wu,
Chao Liu
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.470386
Subject(s) - materials science , refractive index , photonic crystal fiber , magnetic field , sensitivity (control systems) , optics , surface plasmon resonance , optoelectronics , plasmon , wavelength , nanotechnology , physics , electronic engineering , quantum mechanics , nanoparticle , engineering
A surface plasmon resonance (SPR) sensor comprising photonic crystal fiber (PCF) is designed for magnetic field and temperature dual-parameter sensing. In order to make the SPR detection of magnetic field and temperature effectively, the two open ring channels of the proposed sensor are coated with gold and silver layers and filled with magnetic fluid (MF) and Polydimethylsiloxane (PDMS), respectively. The sensor is analyzed by the finite element method and its mode characteristics, structure parameters and sensing performance are investigated. The analysis reveals when the magnetic field is a range of 40-310 Oe and the temperature is a range of 0-60 °C, the maximum magnetic field sensitivity is 308.3 pm/Oe and temperature sensitivity is 6520 pm/°C. Furthermore, temperature and magnetic field do not crosstalk with each other's SPR peak. Its refractive index sensing performance is also investigated, the maximum sensitivity and FOM of the left channel sensing are 16820 nm/RIU and 1605 RIU -1 , that of the right channel sensing are 13320 nm/RIU and 2277 RIU -1 . Because of its high sensitivity and special sensing performance, the proposed sensor will have potential application in solving the problems of cross-sensitivity and demodulation due to nonlinear changes in sensitivity of dual-parameter sensing.