Laminated metasurface capable of realizing full-space holography

A metasurface, full-space technology, applied in the fields of micro-nano optics and holography, can solve the problems of full-space holographic images that have not been found in metasurface technology, and achieve the effect of light weight and small volume

Active Publication Date: 2019-11-22
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, no examples of applying metasurface technology to full-space holographic images have been found

Method used

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  • Laminated metasurface capable of realizing full-space holography
  • Laminated metasurface capable of realizing full-space holography
  • Laminated metasurface capable of realizing full-space holography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] figure 1 A schematic diagram of the optical filter structural unit is shown. Structural unit The structural unit is the base layer, the isolation chamber with the first nano-brick built in and the second nano-brick from bottom to top;

[0044] The isolation chamber is arranged on the base layer, the first nano-brick is arranged inside, and the second nano-brick is arranged on the top surface;

[0045] The first nano-brick is transmissive, almost no reflection occurs, and it acts as a half-wave plate for transmitted light;

[0046] The second nano-brick has the same transmittance and reflectance, and it functions as a half-wave plate for both projected light and semi-transmitted light.

[0047] The upper and lower sides of the base layer of the structural unit are squares with a side length of C; the two sides of the square are the x and y axes, and the apex is the origin to establish a coordinate system;

[0048] The structural dimensions of the first nano brick are ...

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PUM

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Abstract

The invention designs a laminated metasurface capable of realizing full-space holography, and relates to the field of micro-nano optics and holography. The metasurface is composed of a substrate layer, a first nanometer brick array layer, an isolation layer and a second nanometer brick array layer, and phase modulation of transmitted light and reflected light can be achieved at the same time. Whenlight enters the metasurface, part of the light is reflected, and a holographic image is formed in a reflection space; part of the light is transmitted, and a holographic image is formed in a transmission space. The two holographic images are independent of each other and do not influence each other. The laminated metasurface can be applied to the fields of high-end display, virtual reality, augmented reality and the like.

Description

technical field [0001] The invention belongs to the field of micro-nano optics and holography, and in particular relates to a stacked metasurface capable of realizing full-space holography. Background technique [0002] As an ultra-thin subwavelength structure, metasurfaces can be designed as planar optical devices to achieve many functions, such as large numerical aperture lenses, corner reflectors, vortex light generators, achromatic lenses, etc. Metasurfaces can also be used to design holograms. Compared with traditional diffractive optical elements, metasurfaces have many advantages such as flexible design, high spatial resolution, and large diffraction angles. At present, the metasurface unit structure works in the transmission mode or the reflection mode, and the holographic image generated by it is located in the transmission space or the reflection space. Full-space holography is not only conducive to expanding the capacity of holographic information, providing a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/22G03H1/02G02B1/00
CPCG02B1/002G03H1/02G03H1/22
Inventor 李子乐郑国兴戴琦付娆邓联贵邓娟
Owner WUHAN UNIV
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