Graphene electromagnetically induced transparent polarization-insensitive sensors in the mid-infrared frequency band.

In this paper, a polarization-insensitive sensor based on graphene electromagnetically induced transparency (EIT) is proposed. The device consists of two graphene orthogonal T-shaped structures. This T-shaped resonator produces transparent windows that largely overlap under x and y polarizations, and the results demonstrate its good polarization insensitivity.

Novel tunable graphene-encoded metasurfaces on an uneven substrate for beam-steering in far-field at the terahertz frequencies.

In this paper, we present a novel tunable graphene coding metasurface structure using a circular graphene patch on an uneven substrate. By changing the Fermi level of graphene or the thickness of the substrate, we can achieve obvious phase variation. Firstly, we put forward two construction methods of 1-bit coding metasurface based on this mechanism.

Tunable electromagnetically induced transparency based on graphene metamaterials.

In this paper we propose a graphene-based metasurface structure that can exhibit tunable electromagnetically-induced-transparency-like (EIT) spectral response at mid-infrared frequencies. The metasurface structure is composed of two subwavelength mono-layer graphene nano-disks coupled with a mono-layer graphene nano-strip. We show that the coupling of the nano-disks' dipole resonance with the quadrupole resonance of the nano-strip can create two split resonances with a transparency window in between at any desired center frequency within a wide frequency range.