Highly sensitive gamma-ray radiation dosimeter utilizing one-dimensional ternary annular porous photonic crystal comprising polymer-doped dye integration

This research introduces a photonic sensor designed to detect gamma-ray radiation, utilizing a one-dimensional regular ternary annular photonic crystal (1D APhC) structure. The sensor consists of alternating layers of porous silicon, silicon dioxide, and polyvinyl alcohol (PVA) polymer, which is doped with crystal violet and carbol fuchsine dyes. Exposure to varying levels of gamma-ray radiation alters the refractive index of the doped polymer, resulting in a shift in the photonic bandgap (PBG). The analysis of this dosimeter emphasizes how the intensity and position of the left band edge of the PBG are affected. Theoretical investigations are performed using Bruggeman’s effective medium equation and the transfer matrix method (TMM). The study examines the impact of gamma-ray radiation intensity, ranging from 0 to 70 Gy, on the refractive index of the polymer. Furthermore, it explores how critical parameters, such as the movement of the left and right band edges, PBG width, and sensor sensitivity, are influenced by structural modifications. Under optimized conditions, the sensor achieves a sensitivity of 200.8351 nm/RIU in detecting gamma-ray radiation exposure from 0 to 70 Gy. This highly sensitive dosimeter design holds significant potential for various scientific applications, facilitating accurate detection of gamma-ray radiation.