▎ 摘　　要

NOVELTY - The nanodevice has a substrate (3) made of a dielectric material. A graphene layer (1) arranged on the substrate includes two longitudinal ends electrically connected with a source contact (source1) and a drain contact (drain1). An electrically conducting layer (2) comprises a periodic grating structure with grating stripes extending in transversal direction. A dielectric layer (4) is arranged between the graphene layer and the conducting layer. The dielectric layer is made of several monolayers of boron nitride. USE - Nanodevice for generating electromagnetic radiation in terahertz frequency range. ADVANTAGE - The whole terahertz gap which is based on a simple device design can be covered for producing small and inexpensive nanodevices capable of emitting terahertz radiation with high power densities. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of nanodevice in one of the operation modes such as generator mode. Graphene layer (1) Electrically conducting layer (2) Substrate (3) Dielectric layer (4) Drain contact (drain1) Source contact (source1)