Highly sensitive photonic crystal fiber sensor for detection of hemoglobin and sucrose concentration

In this research, a flower-shape photonic crystal fiber sensor is proposed and designed. In this sensor, the most electromagnetic field is concentrated in the core part of the flower causing a surprising increase in the sensitivity of the sensor. Gold is used as a plasmonic material for stability in the environment. The analyte is placed outside the sensor and it makes the possibility of fabrication simple. The geometrical parameters of the sensor are optimized with the Nelder Mead algorithm. The detection power of the sensor is in the bio range and in this research, it is proposed to determine the concentration of sucrose and the concentration of hemoglobin. Taking advantage of the amazing geometry of nested circles to confine the electromagnetic field in the center of the fiber and increase the sensitivity of the sensor is a significant achievement. Using the optimal algorithm for design leads to the adaptation of the optimal geometry and the efficient construction of the sensor. The results show an excellent amplitude sensitivity of 5285 (RIU-1) and a suitable wavelength sensitivity of 11000 (nm RIU-1).