WAVELENGTH SELECTIVE FILTER AND METHOD FOR FABRICATING WAVELENGTH SELECTIVE FILTER

    公开(公告)号:US20220283349A1

    公开(公告)日:2022-09-08

    申请号:US17750023

    申请日:2022-05-20

    IPC分类号: G02B5/28

    摘要: A wavelength selective filter comprises a multi-layered structure alternately having a low refractive index layer and a high refractive index layer, a periodic structure layer facing the low refractive index layer of the multi-layered structure, the low refractive index layer having a refractive index between 1.30 and 1.60 and a thickness between 100 nm and 800 nm, the high refractive index layer having a refractive index between 1.70 and 2.20 and a thickness between 30 nm and 100 nm, and in a plane perpendicular to a thickness direction of the periodic structure layer, the multi-layered structure layer having a periodic structure made of metal or semiconductor.