The development of metamaterials that respond resonantly in interaction with the terahertz (THz) electromagnetic waves is important for the achievement of diverse optical functionalities in this spectral range. One of the types of metamaterials is chiral metamaterials, which consist of chiral resonators interacting differently with the right (RCP) and left (LCP) circularly polarized waves. Interaction of electromagnetic waves with chiral structure produces two phenomena, circular dichroism and optical activity, which for utilization objectives are regarded independently. Active control of these chiral effects in the THz frequency range can be achieved by integrating active material (such as graphene) with metamaterials. By dynamical modulation of the graphene conductivity, the chiral effects can be tuned which allows the realization of modulators which can be implemented in future wireless communication systems and this type of materials is in the focus of our research.

Project type: Bilateral project Serbia-Turkey (2021-2023)