The One-Dimensional Gyroidal Superconductor Photonic Crystals Based Cutoff Frequency Tunability for THz Applications.

For possible uses in the THz frequency range, we investigated the one-dimensional gyroidal superconductor photonic crystals in the current work. In this regard, each unit cell is designed from gyroidal Bi₂Sr₂CaCu₂O₈ (BSCCO) and SrTiO₃ layers. Here, BSCCO is embedded in a hosting dielectric medium of SrTiO₃ to design the gyroidal layer. The transfer matrix approach and the two-fluid model are both used in the computational analysis of the suggested structure. Studying the optical properties and investigating how several factors, including filling fraction, operating temperature, and layer thicknesses, affect the PC's performance. The results showed the emergence of the cutoff frequency at 5.35 THz. In this regard, the value of the cutoff frequency can be tuned based on the filling fraction, operating temperature, and refractive index of the hosting medium, making the structure promising for optical communication applications. [ABSTRACT FROM AUTHOR]