▎ 摘　　要

NOVELTY - The method involves coating a zero-index Meta material on a single graphene layered system. A Goos-Hanchen displacement variation curve of a graphene carrier concentration is obtained by using a numerical calculation formula. Terahertz light is incident to a hierarchical system graphene surface. Carrier concentration of a graphene is obtained by calibration process. USE - Method for measuring graphene carrier concentration by using Goos-Hanchen displacement. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a Goos-Hanchen displacement unit. '(Drawing includes non-English language text)'