  A hybrid plasmonic-dielectric metasurface is proposed in order to manipulate
beam propagation in desired manners. The metasurface is composed of patterned
hybrid graphene-silicon nano-disks deposited on a low-index substrate, namely
silica. It is shown that the proposed hybrid metasurface simultaneously
benefits from the advantages of graphene-based metasurfaces and dielectric
ones. Specially, we show that the proposed hybrid metasurface not only provides
reconfigurability, just like previously proposed graphene-based metasurfaces,
but also similar to dielectric metasurfaces it is low loss and CMOS-compatible.
Such exceptional features give the metasurface exceptional potentials to
realize high efficient optical components. To demonstrate the latter point,
focusing and anomalous reflection are performed making use of the proposed
hybrid structure as examples of two well-known optics functionalities. This
work opens up a new route in realization of reconfigurable meta-devices with
widely real-world applications which cannot be achieved with their passive
counterparts.
