▎ 摘　　要

NOVELTY - The detector has a bandwidth gain component formed with a germanium active layer. An adjustable bandwidth gain assembly comprises a graphene signal lead and a control electrode. The control electrode applies variable voltage to the graphene signal lead to realize adjustment of gain peak, where the control electrode is made of electro-conductive material. The graphene signal lead is directly connected with the germanium active layer, where the graphene signal lead comprises a folded U-shaped structure and zigzag-shaped structure. A silicon waveguide layer comprises a mode conversion structure. USE - Adjustable gain peak featured germanium-silicon photoelectric detector. ADVANTAGE - The detector has better bandwidth gain. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of an adjustable gain peak featured germanium-silicon photoelectric detector.