Abstract
In the present study, we have theoretically proposed a novel sensing tool based on a polymer defective one dimensional photonic crystal for highly accurate and sensitive pressure detection. The strain sensitive refractive indices of photonic crystals constituent materials have been considered to realize a pressure sensor device. The strain sensitive refractive index contrast is the main factor to achieve the goal. The numerical results satisfy significant changes in the refractive indices of these materials with applied hydrostatic pressure. Therefore, the sensitivity of the resonant mode that formed inside the photonic bandgap is very high to the pressure changes. Moreover, the optimization of the parameters of the one dimensional photonic crystals constituent materials such as the angle of incidence, number of layers and thickness of the defect polymer layer has been analyzed to investigate the most possible performance. By using an optimizing process, we have investigated a relatively high sensitivity of the proposed sensor that could reach 21.16 THz/GPa or 199.66 nm/GPa.