▎ 摘　　要

NOVELTY - The polarizing filter has a buried layer arranged on a substrate. A flat waveguide layer is arranged on the buried layer. A graphene layer is arranged on the flat waveguide layer. A ridge waveguide layer is arranged on the graphene layer, where a width of the graphene layer is greater than a width of the ridge waveguide layer, a width of the flat waveguide layer is greater than the width of the ridge waveguide layer, a material of the ridge waveguide layer is silicon nitride or lithium niobate and the ridge waveguide layer is formed as a trapezoidal-shaped structure. USE - Polarization filter. ADVANTAGE - The filter effectively filters the TE polarization mode to achieve high polarization extinction by the loss caused by the graphene layer to the TE mode is greater than the TM mode, increases the absorption spectrum range of the graphene to light, and covers the absorption spectrum from the visible light to the near infrared light, so the polarization filter device has high extinction ratio, wide bandwidth, high integration degree DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing a polarization filter. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a polarization filter. 11Substrate 12Buried layer 13Flat waveguide layer 14Graphene layer 15Ridge waveguide layer