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Dual-functional metasurfaces and their design methods for color nanoprinting and holography

A nano-printing and design method technology, applied in the field of micro-nano optics, can solve the problems of complex design process, large crosstalk of multi-channel work, and low processing error tolerance, and achieve simple design process, high information storage density, and high image quality Effect

Active Publication Date: 2022-01-14
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 metasurfaces are difficult to realize the integration of different types of functions, the crosstalk of multi-channel work is large, the design process is complicated, and the processing error tolerance is low by providing a dual-function metasurface and its design method for realizing color nano-printing and holography

Method used

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  • Dual-functional metasurfaces and their design methods for color nanoprinting and holography
  • Dual-functional metasurfaces and their design methods for color nanoprinting and holography

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Embodiment 1

[0047] Embodiment 1 provides a dual-functional metasurface that realizes color nano-printing and holography, and 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 .

[0048] 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.

[0049] 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-bri...

Embodiment 2

[0054] Embodiment 2 provides the design method of the dual-functional metasurface that realizes color nano-printing and holography as described in embodiment 1, mainly comprises the following steps:

[0055] 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 far-field holographic image, and arranges the steering angle of each nano-brick according to the holographic amplitude distribution calculated by the far-field holographic image. get a supersurface.

[0056] Among them, when optimizing the design of multiple groups of nano-brick structural units, the long axis and short axis of the nano-bricks are scanned, and t...

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Abstract

The invention belongs to the technical field of micro-nano optics, and discloses a dual-functional metasurface for realizing color nano-printing and holography and a design method thereof. The metasurface is composed of several nano-brick structural units, and the nano-brick structural units include substrates and nano-bricks; different groups of nano-brick structural units have different reflection spectral responses under white light incidence, and present different structural colors; each nano-brick As a pixel unit, the unit structure arranges multiple groups of nano-brick structural units according to the color of the color nano-printed image; arranges the steering angle of each nano-brick according to the holographic amplitude distribution calculated correspondingly to the far-field holographic image ; The non-polarized white light is incident on the metasurface, and the reflected light displays a color printed image on the plane where the metasurface is located; the linearly polarized light is incident on the metasurface, and the outgoing light passes through the analyzer to display a far-field holographic image in the Fraunhofer diffraction zone . The invention can realize color nano-printing and far-field holographic multiplexing through a piece of metasurface.

Description

technical field [0001] The invention belongs to the field of micro-nano optics technology, and more specifically relates to a dual-functional metasurface and a design method thereof for realizing color nano-printing and holography. Background technique [0002] Metasurface materials can flexibly and effectively control the amplitude, phase and polarization state of light electromagnetic fields at the sub-wavelength scale, and have the advantages of small size, light weight, and convenient processing, and have been widely used in various fields of optics. By changing the size parameters of the unit structures that make up the metasurface material, it can have different spectral responses, thereby realizing color nanoprinting. Metasurface computational holography has been greatly developed through the amplitude modulation and phase modulation capabilities of metasurfaces. [0003] At present, there have been a lot of researches using metasurfaces to realize nano-printed displ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00G02B5/32G02B27/00G02B1/00
CPCG02B5/00G02B5/32G02B27/0012G02B1/002
Inventor 梁聪玲郑国兴
Owner WUHAN UNIV
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