مشخصات پژوهش

Given that conventional photonic crystals possess fixed and unalterable structures after design and fabrication, they cannot provide dynamically controllable optical properties. In contrast, by employing active media such as plasma, whose optical characteristics can be tuned via external parameters, the design of tunable optical devices becomes achievable. Plasma is recognized as a tunable dielectric medium that has attracted recent research interest due to its unique optical properties. The optical behavior of plasma depends not only on external parameters such as the external magnetic field but is also significantly controllable through plasma electron density and collision frequency. These characteristics make plasma an ideal candidate for designing and fabricating tunable magneto photonic crystals. According to conducted studies, when an external magnetic field is applied perpendicular to the wave propagation direction, the plasma permittivity tensor becomes anisotropic, resulting in remarkable magneto optical effects, including tunable Faraday rotation. This distinctive feature enables the design of tunable optical filters, isolators, and dynamic modulators in the millimeter-wave region.