Nano-meta-material full-color-gamut palette

Abstract

The invention discloses a nano-meta-material full-color-gamut palette and a preparation method thereof. Electron beam photo-etching and reactive ion etching technologies are adopted; a transverse undercutting effect is utilized for obtaining a sub-wavelength periodic-structure array, which suspends above a dielectric layer, on a substrate; a metal film is deposited in the direction perpendicular to the substrate; and forming a metal nanostructured array-metal complementation nanostructured array film coupled structure. The sub-wavelength meta-material shows a mixed surface plasma resonance mode in a visible light spectrum and generates specific optical responses such as multiple resonance peaks, FANO resonance, angle-dependent spectrum adjustability and hundreds of thousands of times field enhancement, so that continuous and adjustable colors can be obtained in a structural unit. The nano-meta-material palette can generate full-color-gamut colors in a CIE chromaticity diagram, and the color pixel can be reduced to one hundred to hundreds of nanometers. The technology provided by the invention has an important application prospect in the fields such as product production, high-definition displaying, artistic creation, orientation sensing, photon codes and information storage.

Description

technical field [0001] The present invention relates to nano-processing and manufacturing technology, surface plasmon photonics, and nano-photonics, and in particular to a palette of nano-metamaterials based on surface plasmon coupling effects. Its technical characteristics: (1) Nano-antenna structure surface plasmon Body coupling, the reflection or extinction spectrum of the coupled structure has multiple resonance peaks in the visible region; (2) The shape and period of the metamaterial structure can be controlled to produce different resonance peaks; (3) The resonance coupling of the nano-antenna is realized in a pixel unit Reconcile a variety of spectral colors, similar to the function of an artist's palette; (4) The color development of the metamaterial palette is sensitive to the incident angle and intensity, and can be stimulated to produce rich colors, including the spectral colors in the CIE chromaticity diagram , non-spectral colors, and continuously adjustable inter...

AI Technical Summary

Problems solved by technology

Traditional color production is based on pigments, but there are still several obvious problems: (1) The color purity obtained by toning is not high enough; (2) The pigment substance is chemically unstable, and it is easy to cause fading and decolorization under long-term strong light exposure. Affect the color fastness; (3) The color of the pigment is sensitive to the ambient humidity and temperature, which is easy to cause the change of the color tone and affect the durability of the color; (4) Most of the pigments contain lead, arsenic, chromium, antimony, cadmium, mercury, etc. Substances, the pigment volatilizes or cracks under strong light to produce toxic substances, which brings great harm to the human body and the environment

However, the current plasma color still has certain limitations: (1) color non-adjustability: only a single pixel can achieve a single color; (2) limited color types: color mixing is achieved by combining pixels, but due to processing technology means Limitations, the types of structural colors dependent on the structure size are limited; (3) The pixel size is difficult to reduce: the plasmonic color based on the metal-dielectric-metal structure mostly depends on the periodic arrangement of the structure, and the repetitive arrangement of the structure limits the pixel size. make it difficult to shrink further

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