CN-122018063-A - Medium super-surface structural color device and structural color brightness regulation and control method

Abstract

The invention discloses a dielectric super-surface structural color device which comprises a transparent dielectric substrate and a dielectric nano rectangular column hexagonal periodic array and a lattice constant which are arranged on the surface of the substrate The range of values is Wherein the medium nanometer rectangular column is of a height Length of And width of The relation is satisfied: , and the length-width ratio is maintained Length of And width of According to the narrow-band reflection peak the center wavelength is jointly optimized. A method for regulating and controlling the brightness of structural color is also disclosed. The invention solves the problems that the prior structural color and super-surface device commonly has limited color purity caused by wide reflection spectrum line, the parameter design of pixels with different colors lacks computable resonance positioning rules, and the capability of realizing continuous modulation of brightness under the condition of keeping stable hue, and the like in the process of realizing the visible light reflection structural color.

Inventors

• LIU YICHEN
• Ju Fayin
• LI NING

Assignees

• 江苏优众微纳半导体科技有限公司

Dates

Publication Date

20260512

Application Date

20260410

Claims (5)

1. 1. A dielectric supersurface structure color device comprising: A transparent dielectric substrate; and a hexagonal periodic array of medium nanometer rectangular columns arranged on the surface of the substrate, and a lattice constant The range of the values is as follows ; Wherein, the The medium nanometer rectangular column is of a height Length of And width of The relation is satisfied: , and the length-width ratio is maintained Length of And width of According to the narrow-band reflection peak the central wavelength is jointly optimized; At incident angle Under near normal incidence conditions, the substrate side first order Rayleigh anomaly wavelength The method meets the following conditions: ; In the formula, At the wavelength of the substrate Refractive index at; By synergistically adjusting lattice constants Geometric parameters of the medium nanometer rectangular column Coupling multipole scattering resonance of the nano column with surface lattice resonance induced by Rayleigh abnormality to form half-width Is realized by narrow-band reflection main peak Wide gamut structured color output within the operating band.
2. 2. The device of claim 1, wherein the substrate is silicon dioxide, the dielectric nano rectangular pillars are titanium dioxide, and the dielectric nano rectangular pillars are of a height 。
3. 3. A dielectric supersurface structure color device as claimed in claim 1, characterized in that the substrate is at a wavelength Refractive index at The Cauchy dispersion model is satisfied in the visible light band: 。
4. 4. a dielectric supersurface structure color device according to claim 1, wherein said device further comprises a polarization multiplexing function: When incident ray polarization angle When the reflection intensity is changed from 0 DEG to 90 DEG, the reflection main peak intensity is as follows Regular decay.
5. 5. A method for regulating and controlling the brightness of structural color by adopting the medium super-surface structural color device as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps: Step S1, setting the height of the medium nanometer rectangular column And selecting a lattice constant according to the target color Geometric parameters of the medium nanometer rectangular column ; Step S2, calculating the first-order Rayleigh abnormal wavelength of the substrate side ; Step S3, defining the long axis direction of the medium nano rectangular column as a 0-degree reference axis; Step S4, controlling the polarization angle of the incident light through the rotating platform or the liquid crystal phase modulator Continuously changing according to 0 DEG to 90 DEG; and S5, enabling the device to generate a narrow-band reflection peak in a visible light wave band reflection spectrum and output structural colors, and realizing continuous modulation of the intensity of a main reflection peak, thereby realizing brightness regulation and control of the structural colors.

Description

Medium super-surface structural color device and structural color brightness regulation and control method Technical Field The invention belongs to the technical field of micro-nano photonics and optical devices, and particularly relates to a medium super-surface structural color device and a structural color brightness regulating method. Background The structural color is generated by scattering, interference or resonance regulation of light by the micro-nano structure, and has the advantages of difficult fading, high resolution pixelation realization, easy integration with micro-nano manufacturing process and the like compared with the traditional pigment and dye, and is widely applied to the fields of display, optical anti-counterfeiting, information coding, sensing and the like. The existing structure color scheme mainly comprises a multilayer thin film interference structure, a plasmon resonance structure of a metal nano structure, a Mie resonance structure of a dielectric nano structure (the Mie resonance structure refers to a low-loss dielectric material such as TiO 2 and Si) and the like. The multilayer thin film interference structure generally depends on the control of the number of stacked layers and the thickness to realize color adjustment, the thickness of a device is larger, pixelation integration is limited, the metal plasmon structure can provide remarkable resonance enhancement, but the problems of larger ohmic loss, limited reflection efficiency, thermal stability and the like generally exist in a visible light band, the medium Mie structure is based on a low-loss high-refractive-index material, can realize higher optical efficiency and better environmental stability, and still has a further optimization space in the aspects of improving color purity, realizing narrow-band high-peak reflection and realizing continuously controllable brightness (gray scale) modulation on a pixel scale. In addition, the periodic nanostructure array can generate Rayleigh abnormality caused by diffraction critical under specific conditions, and generate lattice resonance under the collective coupling action of the array, and the lattice resonance can provide spectral line characteristics narrower than monomer resonance, thereby being beneficial to improving the spectral purity of structural colors. However, the intensity and spectral line shape of lattice resonance are usually closely related to the unit scattering response, and if the design of matching relationship between rayleigh anomaly and unit resonance wavelength is lacking, problems such as insufficient resonance intensity, limited effective color range, and insufficient brightness regulation capability are likely to occur. Meanwhile, in practical application, manufacturability, pixelation integration capability and stable output under specific incidence conditions of the device are required to be considered. Therefore, there is a need to provide a dielectric super-surface structural color device and a structural color brightness control method. Disclosure of Invention In order to solve the problems in the prior art, the invention provides a medium super-surface structural color device and a structural color brightness regulation method, which solve the problems that the color purity is limited, the parameter design of pixels with different colors lacks computable resonance positioning rules and the brightness (gray scale) continuous modulation capability is insufficient under the condition of keeping stable hue and the like caused by the common reflection spectrum line width in the process of realizing the visible light reflection structural color of the existing structural color and super-surface device. The technical scheme for achieving the purpose is as follows: a dielectric supersurface structure color device according to one of the present invention comprises: A transparent dielectric substrate; and a hexagonal periodic array of medium nanometer rectangular columns arranged on the surface of the substrate, and a lattice constant The range of the values is as follows; Wherein, the The medium nanometer rectangular column is of a heightLength ofAnd width ofThe relation is satisfied:, and the length-width ratio is maintained Length ofAnd width ofAccording to the narrow-band reflection peak the central wavelength is jointly optimized; At incident angle Under near normal incidence conditions, the substrate side first order Rayleigh anomaly wavelengthThe method meets the following conditions: ; In the formula, At the wavelength of the substrateRefractive index at; By synergistically adjusting lattice constants Geometric parameters of the medium nanometer rectangular columnCoupling multipole scattering resonance of the nano column with surface lattice resonance induced by Rayleigh abnormality to form half-widthIs realized by narrow-band reflection main peakWide gamut structured color output within the operating band. Preferably, the substrate is silic