▎ 摘　　要

NOVELTY - Van der Waals heterojunction negative refraction focusing device, comprises a base layer, a molybdenum oxide layer, a graphene layer and a metal antenna that are sequentially arranged from bottom to top. The metal antenna is arranged on the molybdenum oxide layer and the graphene layer. The molybdenum oxide layer and the graphene layer form a graphene molybdenum oxide van der Waals heterojunction. The base layer material is metal material, inorganic dielectric material or organic polymer material. The van der Waals heterojunction negative refraction focusing device further includes a metal electrode. The base layer includes a silicon base and a gold base sequentially arranged from bottom to top. USE - Used as van der Waals heterojunction negative refraction focusing device. ADVANTAGE - The device realizes deep sub-wavelength negative refraction through the Vandehua heterojunction based on molybdenum oxide and graphite. It does not need complex micro-micro processing which can effectively avoid reflection and scattering loss. The mixed topological polarization element is capable of regulating and controlling the dispersion profile of the graphene Fermi energy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing van der Waals heterojunction negative refraction focusing device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the van der Waals heterojunction negative refraction focusing device. Silicon substrate (1) Gold substrate (2) Molybdenum oxide layer (3) Metal antenna (4) Incident infrared light (5) Needle tip (6) Graphene layer (7) Metal electrode (8)