▎ 摘　　要

NOVELTY - The circulator has a cross-sectional structure formed by three layers and comprised with layers of graphene, silica and silicon. Planes are formed with a central region of graphene and four waveguides connected together. The central region is normally magnetized in the planes by an external direct current (DC) magnetic field. An electromagnetic source is connected to an input port of a circulator body and protected against possible unwanted reflections from output ports, where propagation of surface plasmon polariton waves propagate symmetrically in the waveguides and transform into edge-guided modes in a magnetized central region. USE - Ultra-wideband circulator for a terahertz region based on graphene. ADVANTAGE - The circulator is small in size, and reduces mass and loss of insertion of transition from the circulator to a load terminal. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical view illustrating a relationship between effective refractive indices of modes and frequencies of waveguides (Drawing includes non-English language text).