Enhancing pressure sensing through Bragg’s well-structured one-dimensional photonic crystal

This paper presents a novel pressure sensor design employing a strain-sensitive Bragg’s well-structured one-dimensional (1-D) photonic crystal (PC). The Bragg’s well-structured configuration within the one-dimensional photonic crystal enables a controlled pathway into the photonic bandgap. By utilizing the pressure-dependent refractive index of the material, the sensor’s channel can be tailored accordingly. The tunability of this channel, in response to applied pressure, is harnessed for high-pressure sensing applications. Notably, the proposed sensor is optimised for operation within the mid-infrared wavelength range, broadening its potential applications. The obtained simulation results demonstrate remarkable sensor performance, with achieved values of 14,617 for the quality factor, 25.5 nm/MPa for sensitivity, and 21.25 /MPa for the figure of merit (FOM). These outcomes underscore the efficacy of the Bragg’s well-structured photonic crystal as a platform for advanced pressure sensing, offering a path toward enhanced sensitivity and precision in pressure measurements.