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Metasurface Array Structure and Its Application in Image Display Multiplexing with Adjustable Gray Scale

An array structure and metasurface technology, applied in the field of micro-nano optics, can solve the problems of inflexible adjustment of gray value, difficult processing, complex nano-array structure, etc., and achieve the effect of easy large-scale processing and production, light weight and small volume

Inactive Publication Date: 2021-05-18
WUHAN UNIV
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  • Claims
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Problems solved by technology

[0004] Embodiments of the present invention provide a metasurface array structure and its application in image display multiplexing with adjustable grayscale, which solves the problem that the grayscale value cannot be flexibly adjusted, the structure of the nanoarray is complicated, and it is difficult to control the binary image multiplexing. processing problem

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  • Metasurface Array Structure and Its Application in Image Display Multiplexing with Adjustable Gray Scale
  • Metasurface Array Structure and Its Application in Image Display Multiplexing with Adjustable Gray Scale
  • Metasurface Array Structure and Its Application in Image Display Multiplexing with Adjustable Gray Scale

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Embodiment Construction

[0037] In order to better understand the above-mentioned technical solutions, the present invention will be further elaborated below in combination with the accompanying drawings and specific implementation methods.

[0038] see Figure 1-Figure 2 , the metasurface array structure provided by the embodiment of the present invention includes: a substrate 2, on which a nanobrick array is arranged; the nanobrick array includes a plurality of periodically arranged nanobricks 1, and the distance between the center points of adjacent nanobricks 1 The distances are the same; both the substrate 2 and the nanobrick 1 are of subwavelength size, and the nanobrick is in the shape of a cuboid.

[0039] The size parameters of the nano-bricks are optimized by electromagnetic simulation software, and the optimized nano-bricks can realize the function of a polarizer. Under the selected working wavelength, the components whose polarization direction is along the long axis of the nano-brick 1 i...

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Abstract

The invention discloses a metasurface array structure and its application in image display multiplexing with adjustable gray levels. The metasurface array structure includes a substrate and a nanobrick array; at the working wavelength, when linearly polarized light is incident on the metasurface array, the reflectance along the long axis of the nanobricks is the highest, and the transmittance along the short axis of the nanobricks is the highest . This kind of metasurface array structure can realize binary image display multiplexing with arbitrarily adjustable gray scale. Each nanobrick in the metasurface array can correspond to a pixel in a displayed image. In the case that two binary images for display multiplexing are selected, the nano-bricks in the metasurface array have only four values. The two binary images can be displayed separately under different lighting conditions (polarization direction of linearly polarized light and direction of transmission axis of analyzer). At the same time, the gray value in each image can be changed by adjusting the polarization direction of the incident ray, the steering angle of the nano-bricks and the direction of the transmission axis of the analyzer.

Description

technical field [0001] The invention relates to the field of micro-nano optics, in particular to a metasurface array structure and its application in image display multiplexing with adjustable gray levels. Background technique [0002] Metasurface is a sub-wavelength artificial layered material that can flexibly and effectively control the characteristics of electromagnetic wave polarization, amplitude, phase, polarization mode, and propagation mode. After being designed, metasurfaces can realize many functions of traditional optical devices, and at the same time have the characteristics of high integration, high efficiency, and multiple degrees of freedom. [0003] In recent years, many researchers have realized the functions of grayscale image display and multiplexing through the design of metasurface materials. However, in the current existing technologies, there are shortcomings such as the inability to flexibly adjust the image gray level in display multiplexing, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00G02B27/00G02B5/30
CPCG02B1/002G02B5/30G02B27/0012
Inventor 郑国兴周楠李嘉鑫李子乐单欣李仲阳
Owner WUHAN UNIV
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