Multi-physical quantity sensing based on magnetized plasma spherical photonic crystals with evanescent wave

Abstract In this paper, a novel structure of magnetized plasma spherical photonic crystals is proposed that enables the development of sensors based on the evanescent wave principle. This sensor structure integrates plasma with two isotropic media and applies periodic boundary conditions. Leveraging the principle of the evanescent wave, when the incident light is perpendicular to the interface of a medium with high optical density or thickness and the incident angle exceeds a critical angle, the transfer matrix method is utilized to compute the sharp peaks in the transmission spectrum. Subsequently, sensors produced using these sharp absorption peaks can detect the magnetic induction intensity, plasma frequency, and solution concentration of serum creatinine. The sensitivity and quality factors of these measurements are 8.35 × 1010 T −1 , 3583, 1.5 × 10 −4 (2πc/d) −1 , 2970, 3.55, and 22 824, respectively. Furthermore, a detection limit of 9.155 02 × 10 −6 RIU should be taken into account to ensure the normal operation of serum creatinine detection, satisfying the minimum requirements of biosensing.