A generalized temporal transfer matrix method and its application to modeling electromagnetic waves in time-varying chiral media

Chiral metamaterials have attracted significant attention in recent years due to their unique properties both the microwave and optics regimes. However, most existing works rely on engineering desired of spatial interfaces, concept time-varying chirality has only recently begun be explored. As a consequence, there is currently lack suitable tools for evaluating propagation electromagnetic (EM) waves chiral media. such, this paper presents theoretical formulation temporal reflection transmission EM media using transfer matrix method (TTMM). The developed TTMM tool will then utilized explore several application examples including structure with an arbitrary profile, optical activity generated from time anti-reflection coatings. In addition, we employ specialized finite-difference time-domain (FDTD) technique, known as BI-FDTD, all scenarios validate proposed theory.