Tunable Photonic Band Gaps in Two-Dimensional Bravais–Moiré Photonic Crystal Composed of High-Tc Superconductors

In this study, we perform a theoretical study of light propagation properties in two-dimensional square photonic crystals (PCs) following Bravais–Moiré (BM) patterns composed copper oxide high-temperature superconductors (HTSCs). The BM PCs are made cylindrical cores formed from the combination two Bravais lattices. Moiré pattern forms due to commensurable rotation one these lattices with respect other. dielectric function superconducting material is modeled by two-fluid Gorter–Casimir theory. We report on corresponding gap, mapping as radius cores, well dispersion relations TM modes for and waveguide system built defect lines within such crystal. were HTSCs, which exhibit large tunability terms temperature.