Hybrid plasmon waveguide Bragg grating polarization filter

• Main Authors: LIU NING, LI SHENG, LU YUNQING, CHI TIANTIAN, XU JI, YAO HAN, YANG XINZE
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention provides a mixed plasmon waveguide Bragg grating polarization filter, a Bragg grating is formed by alternately arranging two mixed plasmon waveguides with high refractive index layers modulated by different side wall contours, and the modulated side wall contours are respectively a parabola type and a linear type; each of the alternately arranged mixed plasmon waveguide structures comprises a SiO2 substrate, a side wall profile modulated high refractive index dielectric layer Si, a supporting layer ZnO and a metal layer Ag; the high refractive index material Si with the width of Wsi is placed in the middle above the SiO2 substrate, the supporting layers ZnO are symmetrically placed on the two sides above the SiO2 substrate to support the metal layer Ag, and a transition supporting layer Si3N4 is filled between the supporting layers and the metal layer. The filter is compact in structure, and transmission spectrum optimization of low-frequency passband and forbidden band frequency bands can be ac