Polarization controllable multi-window electromagnetically induced transparency-like in a graphene metamaterial

This study presents a novel metamaterial structure utilizing graphene metamaterial for polarization control, resulting in a multi-window electromagnetically induced transparency (EIT)-like effect. The unit structure comprises double graphene square rings (DGSRs) and a parallel graphene strip (GS). By varying the angle of polarization of the incident light, the number of transparent windows can be switched among 0, 1, 2, and by manipulating the geometric parameters and Fermi level of the graphene structure, the amplitude and frequency of the transparent window can be dynamically adjusted. In addition, when the incident wave is obliquely incident, the metamaterial structure has good insensitivity to the incident angle (<60 degrees). Furthermore, the potential applications of this metamaterial structure in slow light effect and refractive index sensing are also investigated, demonstrating its promising performance.