Metal metasurface capable of realizing ultrahigh-resolution grayscale image display function and application thereof

An ultra-high-resolution, gray-scale image technology, applied in the direction of instruments, polarizing elements, optics, etc., can solve the problems of unsatisfactory image storage and display fields, complex processes, and difficulty in generating image information, etc., to achieve storage and display, work The mode is flexible, simple, precise and the effect of continuous light intensity modulation

Inactive Publication Date: 2020-02-28
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large pixel size of the display device, the traditional image display technology has low image resolution, and it is difficult to generate more complex image information, and the process is complex and bulky, which can no longer meet the requirements of miniaturization development in the field of image storage and display. Develop new optical storage and display technology to adapt to the current trend of miniaturization and integration of optical systems

Method used

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  • Metal metasurface capable of realizing ultrahigh-resolution grayscale image display function and application thereof
  • Metal metasurface capable of realizing ultrahigh-resolution grayscale image display function and application thereof
  • Metal metasurface capable of realizing ultrahigh-resolution grayscale image display function and application thereof

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Embodiment

[0040] This embodiment provides a metasurface based on a metal nanobrick array structure for ultra-high resolution grayscale image display. The metasurface is formed on a plane by a periodic array of multiple unit structures, and is composed of a substrate 2 and metal nano bricks 1 etched on the substrate.

[0041] In this embodiment, the fused silica material is used as the substrate, and the metal aluminum material is used to etch the nano-brick structure. The single unit structure is as figure 1 As shown, it consists of a nanobrick 1 and a substrate 2, wherein the substrate 2 is a cuboid structure with a cross-section of a square whose side length is CS, and the dimensions of the nanobrick structure are sub-wavelength in length L, width W, and height H. The two right-angled sides of the cross-section of the substrate 2 are respectively the x-axis and the y-axis, and the height is the z-axis, and an xyz rectangular coordinate system is established. The long side of the nano ...

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Abstract

The invention discloses a metal metasurface capable of realizing an ultrahigh-resolution grayscale image display function and an application of the metal metasurface. The metasurface is formed by periodically arraying a plurality of unit structures on a plane. Each unit structure comprises a substrate and a metal nano-brick which is arranged on the substrate and has a turning angle. Based on the plasma resonance effect of the metal nano bricks, a structure with polarization beam splitting can be designed through a specific nano brick size; based on the Malus law, the accurate and continuous gray scale modulation can be achieved by changing the rotation angle, and the metasurface is applied to ultra-high resolution gray scale image display. The image display technology based on the metal metasurface is simple and flexible in design method, the metasurface is small in size, light in weight, compact in structure, easy to integrate and the like, and therefore, the metasurface can be widelyapplied to the fields of high-density optical information storage, high-end product anti-counterfeiting, information encryption and the like.

Description

technical field [0001] The invention belongs to the field of micro-nano optics and polarization optics, and in particular relates to a metal metasurface capable of realizing ultra-high resolution grayscale image display and its application. Background technique [0002] Images are widely used in many research fields such as industrial production, medical diagnosis, resources, environment, meteorology and traffic management monitoring and cultural education, so the research on image storage and display technology is particularly important. Due to the large pixel size of the display device, the traditional image display technology has low image resolution, and it is difficult to generate more complex image information, and the process is complex and bulky, which can no longer meet the requirements of miniaturization development in the field of image storage and display. Develop new optical storage and display technology to adapt to the current trend of miniaturization and inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00G02B5/30
CPCG02B5/008G02B5/30
Inventor 戴琦郑国兴李子乐李仲阳付娆邓娟邓联贵李嘉鑫
Owner WUHAN UNIV
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