Simulation Study Of Wide-band Transmission Nano-structured Color Filter

We live in a colorful world,and color is one of the human eye's perception of light.Light-based diffraction,scattering and interference micro-nano physical structure color filters?MNPSCFs?are environmentally friendly,stable and full compared to traditional dyes with high pollution and fading.MNPSCFs are widely used in optical anti-counterfeiting technology,nano art and file encryption.Integrated circuits require high-resolution,full-color structures to facilitate integrated filters.With simulation we designed Fabry-Pérot cavity MNPSCFs based on the thin film interference effect to achieve high transmittance and excellent angular sensitivity.?1?The Ag/TiO₂/Ag three-layer stack structure.Metal Ag selectively transmits light of a specific wavelength;the thickness of the dielectric layer TiO₂ determines the shift of the transmission peak position?wavelength?,and the red,green,and blue color filters can be realized.?2?The Ni/HSQ/Ag three-layer stack film.This MNPSCF works similar to the Ag/TiO₂/Ag one.Both metal Ni?replacing noble metal Ag?and thinner HSQ film reduce the costs,which facilitate industrial application.?3?The Ag/ITO/SiO₂/Ag four-layer stack structure.Relative to the Ag/TiO₂/Ag MNPSCF,in this filter the ITO is an antireflection layer that can enhance the transmittance of light.The angle sensitivity of these MNPSCFs can be widened by changing the thickness of lower metal layer?the second Ag layer?,and increasing the substrate thickness increases the transmission of light.Compared to surface plasmon-based filters,Fabry-Perot cavity-based color filters not only have high transmittance and excellent angular sensitivity,but also require no complicated lithography.It can also cover the entire visible light band,facilitating large-scale production.