Radiation detector based on coupling between defect mode and topological edge state mode in photonic crystal

Symmetrical one-dimensional photonic crystal structure with polymer nanocomposite materials is introduced as the basis for an extremely sensitive and accurate gamma radiation sensor. The architecture of the sensor makes use of the interaction between a defect mode and a topological edge state to provide remarkable optical performance when exposed to gamma radiation. In response to changing gamma dosages, the transmittance spectra show a noticeable wavelength change and a highly accurate linear correlation. Key performance parameters of the sensor include a sensitivity of 0.2267 nm/RIU and quality factor of 447,747.5. These measurements highlight the sensor's exceptional stability and resolution in detecting even the smallest variations in gamma radiation dosages. With potential uses in industrial, environmental, and medical monitoring, the suggested sensor is a breakthrough in radiation detection. In future work, we aim to enhance sensitivity and utilize more stable materials to improve performance under high radiation doses.