Dual-function device for realizing electromagnetically induced transparency and perfect absorption

The invention provides a dual-function device capable of realizing electromagnetically induced transparency and perfect absorption. The device is of an array structure in the x direction and the y direction, and the basic unit structure of the device is characterized by being composed of vanadium dioxide 1, silicon dioxide 2, graphene split rings 3 and graphene strips 4. When vanadium dioxide is low in conductivity and shows an insulator, the structure can achieve an electromagnetic induction transparent effect, and the Fermi level of graphene and the conductivity of vanadium dioxide are adjusted to achieve the adjustment and modulation functions of a transparent window and group delay; when the conductivity of vanadium dioxide is increased and the vanadium dioxide shows metallic property, the structure can realize a dual-band perfect absorption function, and the absorption peak can be tuned by controlling the Fermi level of graphene. The device can be used for a modulator, a slow light device, an optical swi