Flexibly designed polarization-independent electromagnetically induced transparency-like effect via hybrid metal–dielectric terahertz metamaterial

Abstract

Opening the terahertz electromagnetic band to a wealth of applications still requires the development of new devices. For example, effective means to filter, modulate, and route terahertz beams are still required for terahertz communications, spectroscopy, and sensing to achieve their promise. In particular, metasurfaces are widely discussed for future 6G wireless communications systems. These applications, however, will also require new functionality, such as the ability to design structures enabling a more complex spectral response. Here we outline systematic design principles to realize the polarization-independent electromagnetically induced transparency-like effect in a class of planar terahertz metamaterials that can be fabricated using commonly available processes and whose structural parameters can be flexibly varied to provide wide tuning of the transparency windows within the broader absorption band. We also show how the basic concept can be used to achieve dual transparency bands.