Design of terahertz devices based on dielectric metasurface: beam deflector and focusing deflector meta-lens

In this paper, a beam deflector and a focusing deflected meta-lens are designed using transmissive all-dielectric metasurface. Simulation results show that the beam deflector can deflect an electromagnetic wave of 0.5 THz by 20° at normal incidence, while the focused deflected meta-lens is designed to focus an electromagnetic wave of 0.675 THz at
$F=6000\mu m$
and deflect it by 10°. Both designs are simple in structure, light in weight and easy to manufacture, and will have great promise for applications in security detection and wireless communications.