全介质圆环-纳米棒结构宽色域颜色滤波器

Wide-Gamut Color Filter Using All-Dielectric Ring-Nanorod Structure

设计了一种新型的全介质圆环-纳米棒结构颜色滤波器。全介质圆环-纳米棒阵列结构与入射光的相互作用激发米氏共振,其在可见光波段展现出较强的反射特性,从而实现不同颜色的宽色域。采用时域有限差分法对纳米棒、纳米环、硅圆环-纳米棒三种不同结构滤波器的反射光谱及其颜色显示规律进行比较。同时研究纳米棒直径、圆环直径、高度和周期等主要参数对反射光谱及颜色特性的影响。结果表明:所设计的全介质圆环-纳米棒结构的滤波器在特定光波段的反射特性得到极大的提升;经优化后的颜色滤波器在可见光范围内的反射率达到70%以上,通过改变纳米棒直径可实现宽色域颜色滤波特性,其色域面积高达0.115。该研究为下一代颜色滤波器的设计提供理论依据。

A new-type color filter has been designed using an all-dielectric ring-nanorod structure.The interaction of incident light with the all-dielectric ring-nanorod array structure is used to activate the Mie resonance,which has high reflection capabilities in the visible light band,allowing for a wide gamut of distinct colors.Using the finite-difference timedomain(FDTD)method,we compare the reflectance spectra and color display laws of three filters with other structures(nanorods,nanorings,and silicon ring-nanorods).Simultaneously,the impact of key parameters such as nanorod diameter,ring diameter,height,and period on the reflection spectrum and color characteristics is examined.According to the findings,the developed all-dielectric ring-nanorod structure filter considerably improves the reflection properties of the specific light waveband;the optimum color filter has a visible light reflectivity of more than 70%.The color gamut area of the nanorods can reach 0.115,and the diameter of the nanorods can be modified to achieve wide gamut color filtering properties.This study provides a theoretical foundation for the development of next-generation color filters.