Design method of metasurface capable of realizing transflective dual-channel holographic multiplexing

A design method and metasurface technology, applied in the fields of micro-nano optics and optical holography, can solve the problems of limited information storage capacity and inability to store information encryption, and achieve the effects of light weight, easy processing and easy integration

Inactive Publication Date: 2021-05-18
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional holographic film is not sensitive to the polarization state, cannot realize the encryption of the stored information, and can only reproduce the holographic image in the transmission or reflection space, and the capacity of information storage is limited.

Method used

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  • Design method of metasurface capable of realizing transflective dual-channel holographic multiplexing
  • Design method of metasurface capable of realizing transflective dual-channel holographic multiplexing
  • Design method of metasurface capable of realizing transflective dual-channel holographic multiplexing

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] 1. Optimize the design of nano-brick unit structure.

[0037] In the following, the nano brick unit structure is a cuboid as an example for illustration. The length, width and height of the nano brick unit structure are all sub-wavelength.

[0038] The nano-brick unit structure is composed of a substrate 2 and a nano-brick 1 etched on the substrate, such as figure 1 As shown, the xyz rectangular coordinate system is established, and the lengths of the nano brick 1 in the x direction and the y direction are L respectively x and L y , the height in the z direction is H, and the side lengths of the base in the x and y directions are both C.

[0039] According to the theory of equivalent refractive index, the unit structure of nanobricks is equivalent to a miniature waveguide. Since the lengths of nanobricks along the x and y d...

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Abstract

The invention discloses a design method of a metasurface capable of realizing transflective dual-channel holographic multiplexing. The metasurface is composed of a transparent substrate and a nano-brick array etched on the transparent substrate, and can generate two Two holographic images can be used to realize dual-channel holographic multiplexing, which improves the capacity of information storage. The two channels can be used alone or at the same time, and the two channels are independent of each other and do not affect each other. The invention has potential application value in the storage, display, encryption, anti-counterfeiting and other fields of optical information.

Description

technical field [0001] The invention relates to the technical fields of micro-nano optics and optical holography, in particular to a design method for a metasurface capable of realizing transflective dual-channel holographic multiplexing. Background technique [0002] Optical holography is a powerful tool for reconstructing the wavefront of light for information storage and retrieval. However, the traditional holographic sheet is not sensitive to the polarization state, cannot encrypt the stored information, and can only reproduce the holographic image in the transmission or reflection space, and the capacity of information storage is limited. On the basis of realizing basic optical properties, metasurfaces can realize optical information multiplexing through multi-dimensional encoding such as phase, wavelength, spatial frequency, and polarization state. Therefore, holography based on metasurfaces has a very broad prospect in optical display and storage. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 郑国兴付娆李子乐单欣李仲阳
Owner WUHAN UNIV
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