▎ 摘　　要

NOVELTY - The tube has a gate, a SiO2 substrate (2), a single-layer graphene (3), a source electrode and a drain electrode. The corners of the surface of the SiO2 substrate are provided with a gold electrode (4). The gold electrodes are respectively used as the source electrode and the drain electrode of a pair of devices. The grid electrode is provided with a pair of source electrode that is arranged below the SiO2 substrate. The middle portion of the surface of the SiO2 substrate is provided with multiple trapezoidal channels (5). The single-layer graphene is arranged on the surface of the SiO2 substrate. The wide channel position forms a suspension-type arc surface structure. The sides of the gold electrode are formed with ohm connection. The other single-layer graphene is arranged on the surface of the SiO2 substrate. The narrow channel position forms a suspended arc-shaped surface structure. The sides of the gold electrode are formed with ohm connection. USE - Adjustable electrically-biased suspended graphene field effect tube for use in terahertz wave band. ADVANTAGE - The adjustable electrically-biased suspended graphene field effect tube solves the space distribution of the hot electron in the graphene, improves the radiation efficiency so as to generate terahertz radiation signal under the action of direct current bias electric field, adjusts the signal radiation frequency by adjusting the width of the channel, avoids graphene radiation energy to conduct to the substrate to effectively improve the thermal electron temperature in the single-layer graphene. The graphene layer uses graphene radiation light and reflected light from the channel to form interference effect to improve radiation efficiency. DESCRIPTION OF DRAWING(S) - The drawing shows a top view of the adjustable electrically-biased suspended graphene field effect tube. 2SiO2 substrate 3Single-layer graphene 4Gold electrode 5Channel