Electromagnetically induced transparency (EIT) arises from coupling between the bright and
dark mode resonances that typically involve subwavelength structures with broken
symmetry, which results in an extremely sharp transparency band. Here, we demonstrate a
tunable broadband EIT effect in a symmetry preserved metamaterial structure at the
terahertz frequencies. Alongside, we also envisage a photo-active EIT effect in a hybrid
metal-semiconductor metamaterial, where the transparency window can be dynamically …