▎ 摘　　要

NOVELTY - The graphene structure (100) has a graphene stack which is comprised of graphene layers and thin film dielectric layers. The graphene layers and the thin dielectric layers are alternately stacked on one another. The graphene layers are made of amorphous graphene. An electric field former is configured to apply an electric field to the graphene layers. The amorphous graphene is present in a form of a pattern. The thin film dielectric layer is comprised of a thickness less than 20 nm. The thin film dielectric layers are formed using atomic layer deposition. USE - Multi-stack graphene structure used in beam steering device. ADVANTAGE - The efficiency of optical absorption of the multi-stack graphene structure is enhanced by increasing the number of the graphene stacks. The enhancement factor of the device can be gradually increased, by increasing the number of graphene stacks. The optical characteristic modulation efficiency can be enhanced. Since the thickness of the thin film dielectric layer is small, any spaces between the graphene stacks can be reduced, thus enhancing the efficiency of the electric field. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of the beam steering device. Multi-stack graphene structure (100) Beam steering device (600)