Metasurfaces: From Fundamental Ideas of Topological Photonics to Applications in Magnetic Resonance Imaging

Metasurfaces have become a new paradigm in the studies of artificial subwavelength structures due to their potential to overcome many challenges typically associated with metamaterials. In this contribution, recent advances in the field of microwave metasurfaces are described with the focus on novel fundamental ideas of two-dimensional topologically protected structures as well as on applications in the field of medical imaging.