Metasurface capable of realizing non-reciprocity function

A technology of metasurface and sexual function, applied in the field of metasurface, can solve the problems of non-reciprocity and non-reciprocity, etc., and achieve the effect of light weight, simple structure and small volume

Active Publication Date: 2019-12-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For reflective metasurface materials, since they can only work in a certain reflection space, they have neither reciprocity nor non-reciprocity

Method used

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  • Metasurface capable of realizing non-reciprocity function
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  • Metasurface capable of realizing non-reciprocity function

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Embodiment

[0034] This embodiment provides a metasurface capable of realizing non-reciprocal functions. The schematic diagram of the metasurface array is shown in figure 1 shown. The metasurface is composed of a plurality of unit structures periodically arrayed on a plane, and the size and center interval of each adjacent nano-brick in the nano-unit array are the same. Unit structure such as figure 2 As shown, it is composed of the first and second nano-bricks arranged on the upper and lower surfaces of the base layer. The base layer is a square sheet structure with side length C on both the upper and lower surfaces, and is made of fused silica glass material. The nano-bricks are made of silver material, and their length, width and height are all sub-wavelength. Take the right-angle sides of the upper and lower surfaces of the base layer as the x-axis and y-axis, and the apex as the origin, the angle between the long axis of the first nano-brick and the x-axis is θ1, and the angle be...

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Abstract

The invention discloses a metasurface capable of realizing the non-reciprocity function. The metasurface is formed by periodically arranging a plurality of unit structures in an array on a plane. Eachunit structure consists of a first nano brick, a second nano brick and a substrate layer. The substrate layer is a laminated structure with square upper and lower surfaces; and the first and second nano-bricks are respectively arranged on the upper and lower surfaces of the substrate layer. The first nanometer brick plays a role like a transmission type half-wave plate; and the second nanometer brick has the function of a transmission type polarizer. With the linear polarizer, the metasurface is capable of realizing independent intensity modulation on vertically incident transmission light from the first nano-brick and the second nano-brick. According to the invention, the metasurface has the independent intensity modulation capability on transmission light from the first nano-brick and the second nano-brick respectively and two independent high-resolution grayscale images can be generated in two transmission spaces to realize nonreciprocity. The metasurface can be applied to the fields of high-end display, virtual reality, augmented reality and the like; and a novel method and way are provided for the future safety technologies.

Description

technical field [0001] The invention relates to the fields of micro-nano optics and image display, in particular to a metasurface capable of realizing a non-reciprocal function. Background technique [0002] As an ultra-thin sub-wavelength structure, metasurface has the advantages of high spatial resolution, large diffraction angle, and strong light wave manipulation ability that cannot be compared with traditional optical elements. It can be used to design planar optical devices such as holograms, lenses, and gratings. At present, metasurface materials can be roughly divided into two categories, one working mode is transmission, and the other working mode is reflection. For reflective metasurface materials, since they can only work in a certain reflection space, they have neither reciprocity nor non-reciprocity. For the transmissive metasurface material, because it has the same manipulation effect on the light incident on the nanobrick first and then through the substrate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B5/3025
Inventor 邓娟郑国兴李子乐李仲阳
Owner WUHAN UNIV
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