基于电磁诱导透明的双控多功能超表面

Abstract

Objective The phenomenon of electromagnetically induced transparency (EIT) was first discovered in atomic systems with threelevel distributions. It is a destructive interference phenomenon between strongly coupled light beams in different transmission paths, which makes initially opaque media transparent. However, the implementation of EIT in atomic systems requires extremely strict external conditions, such as ultralow temperatures and intense pumping light, which limit its practical application and development. In recent years, with vigorous research on metasurfaces, the EIT phenomenon has overcome traditional limitations and can be achieved via the coupling of the bright or dark modes of metasurfaces, thereby expanding its applications in molecular sensing, slowlight devices, and other fields. However, a large portion of the research on EIT metasurfaces selects nonadjustable metal structures in their