Photonic crystal fiber-based blood components detection in THz regime: Design and simulation

A mono-rectangle based photonic crystal fiber (PCF) model is designed as a biosensor. This model has been simulated and numerically analyzed using the finite element method (FEM). The anticipated model shows higher efficiency in detecting blood components, namely, red blood cell (RBC), white blood cell (WBC), hemoglobin (HB), water, and plasma in the THz regime. The model shows approximately 0.005 cm−1 effective material loss and a confinement loss of 10−12 (in cm−1) order at 2.2 THz. The numerical aperture for this model at this point is approximately 0.20. The relative sensitivities for this model are 96.19%, 95.57%, 95.89%, 95.01%, and 95.39% for RBC, WBC, HB, water, and plasma respectively at 2.2 THz. All these typical values for the optical parameters demonstrate the potentiality of the modelled biosensor since this model ensures higher sensitivities in detecting blood components preserving a lower level of confinement and effective material loss. Besides, the simplified design of this biosensor preserves the feasibility of fabrication engaging current strategies. •Mono-rectangular core photonic crystal fiber (PCF)-based biosensor.•Sensing of RBC, WBC, Plasma, water, and Hemoglobin.•Approximately 96.19% relative sensitivity for blood components sensing.•A very negligible amount of confinement loss and effective material loss.•High fabrication feasibility due to the simple model structure.