Angle-tolerant polarization controlled continuous color palette from all-dielectric nanograting in reflective mode

Abstract

High-performance angle-tolerant polarization tunable reflective color filters with an adopted one-dimensional silicon grating structure are proposed. The polarization-tunable color filtering properties and incident angle-insensitive properties are thoroughly investigated to achieve the angle-tolerant polarization controlled continuous color palettes. Benefiting from high refractive index of silicon, the proposed color filters evidently provide a high angular tolerance of 30° in conjunction with a large polarization-tunable color range. Moreover, full and vivid colors covering the entire visible range can be produced by simply altering the grating thickness. The combination between the all-dielectric nanostructure with a high angular tolerance and the polarization-tunable filtering properties, described in this paper, can be applied in anti-counterfeiting, imaging and filtering technologies, and so forth.