▎ 摘　　要

NOVELTY - The tunable graphene detector structure comprises substrate (130) that has a source electrode, a drain electrode and a gate electrode. A graphene layer is interposed between the electrodes. A magnet is configured to be movable relative to the graphene. An antenna structure is formed from the source and drain electrodes. The antenna structure is configured to receive terahertz (THz) radiation (170). The movable magnet is moved via linear actuator mechanism. The fixed unit is configured as a ring. The movable unit is configured as a rod that moves within the fixed ring. The graphene layer is included in a graphene stack. USE - Tunable graphene detector structure for detection of terahertz electromagnetic radiation by terahertz spectrometer (claimed). ADVANTAGE - A variable electrical current is employed through a conductive coil in conjunction with a permanent magnet to generate a variable or tunable magnetic field. The tunability is achieved by physically moving the magnet relative to the tunable field effect transistor (FET) detector arrangement. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for detecting terahertz (THz) radiation by a field-effect transistor (FET) structure. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of tunable graphene detector structure. Tunable Thz Detector Structure (100) Substrate (130) Graphene Region (140) Magnetic Field (150) Terahertz radiation (170)