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Three-channel metasurface for color nano printing and holographic multiplexing and design method thereof

A nano-printing and design method technology, applied in the field of micro-nano optics, can solve problems such as difficult to realize complex image multiplexing, complex metasurface design process, poor tolerance of processing errors, etc., and achieve high image quality and reconstruction quality of structural color display High, simple design process effect

Active Publication Date: 2021-06-01
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems in the prior art that the metasurface design process is complicated, the processing error tolerance is poor, and it is difficult to realize the multiplexing of complex images by providing a three-channel metasurface and a design method for color nano-printing and holographic multiplexing

Method used

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  • Three-channel metasurface for color nano printing and holographic multiplexing and design method thereof
  • Three-channel metasurface for color nano printing and holographic multiplexing and design method thereof
  • Three-channel metasurface for color nano printing and holographic multiplexing and design method thereof

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Embodiment 1

[0056] Embodiment 1 provides a three-channel metasurface for color nano-printing and holographic multiplexing, the metasurface is composed of several nano-brick structural units; the nano-brick structural unit includes a substrate and nano-bricks arranged on the working surface of the substrate .

[0057] The direction of the two sides parallel to the working surface of the base is respectively set as the x-axis and the y-axis to establish an xoy coordinate system, the nano-brick is a cuboid structure, and the long axis and short axis of the nano-brick are all in line with the The working surfaces of the base are parallel, and the steering angle of the nano-bricks is the angle between the long axis of the nano-bricks and the x-axis.

[0058] Different groups of nano-brick structural units correspond to different size parameters of the long axis or short axis of nano-bricks, and different groups of nano-brick structural units correspond to the same height and size of nano-brick...

Embodiment 2

[0063] Embodiment 2 provides the design method of the three-channel metasurface of color nano-printing and holographic multiplexing as described in embodiment 1, comprising the following steps:

[0064] Optimize the design of multiple groups of nano-brick structural units, so that multiple groups of nano-brick structural units have different reflection spectral responses under white light incidence; design color nano-printed images, and use each of the nano-brick unit structures as a The pixel unit arranges a variety of nano-brick structural units according to the color of the color nano-printed image; designs the first far-field holographic image, and obtains the first preparation according to the holographic amplitude distribution calculated correspondingly to the first far-field holographic image Select a steering angle and a second candidate steering angle; design a second far-field holographic image, and calculate the complex amplitude distribution corresponding to the sec...

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Abstract

The invention belongs to the technical field of micro-nano optics, and discloses a three-channel metasurface for color nano printing and holographic multiplexing and a design method thereof. The metasurface is composed of a plurality of nano brick structure units, and the nano brick structure units in different groups have different reflection spectral responses under the incidence of white light; non-polarized white light is incident to the metasurface, and reflected light displays a color nano printing image in a near field; linearly polarized light with a polarization angle of 0 is incident to the metasurface, emergent light passes through an analyzer in the direction of a light-transmitting axis, and a first far-field holographic image is displayed in a Fraunhofer diffraction region; circularly polarized light is incident to the metasurface, and emergent light displays a second far-field holographic image in the Fraunhofer diffraction region. According to the invention, one color nano printing image and a plurality of far-field holographic images can be displayed through one metasurface.

Description

technical field [0001] The invention belongs to the field of micro-nano optics technology, and more specifically, relates to a three-channel metasurface for color nano-printing and holographic multiplexing and a design method thereof. Background technique [0002] There are two main colors of objects in nature: pigmented color and structural color. Pigment color is the color that is intuitively presented after a single substance absorbs or reflects light, while structural color is a variety of colors produced by a large number of ordered structures that scatter, diffract or interfere with light of different wavelengths. Structural color, also known as physical color, is a color caused by the wavelength of light. It is a variety of colors produced by refraction, diffuse reflection, diffraction or interference of light waves due to fine structures. Structural color is a color expression method without pigment. It has the characteristics of high saturation, never fading, and c...

Claims

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Application Information

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IPC IPC(8): G02B5/00G02B5/32G02B27/00G02B1/00
CPCG02B5/00G02B5/32G02B27/0012G02B1/002
Inventor 梁聪玲郑国兴
Owner WUHAN UNIV