Code division multiplexing method based on metasurface holography

A code-division multiplexing and ultra-intelligent technology, which is applied in the field of micro-nano optics and holography, can solve the problems of cumbersome implementation of optical methods, and achieve the effect of increasing confidentiality and information density

Active Publication Date: 2021-08-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the process of encoding and decoding is completed in the computer, and the process of using optical methods is cumbersome

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  • Code division multiplexing method based on metasurface holography
  • Code division multiplexing method based on metasurface holography
  • Code division multiplexing method based on metasurface holography

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the drawings and embodiments. At the same time, the technical problems and beneficial effects solved by the technical solution of the present invention are also described. It should be pointed out that the described embodiments are only intended to facilitate the understanding of the present invention, and have no limiting effect on it.

[0034] like figure 1 As shown, the present embodiment is a code division multiplexing method based on metasurface holography. The amorphous silicon dielectric nano-square column is selected as the metasurface unit structure, the substrate is a fused silica substrate, and the number of metasurface unit structures is selected to be 840. ×840, the cycle is 540nm, the light source is a laser with a wavelength of 720nm, and the polarization channels are selected as horizontally polarized and vertically polarized linearly polarized light. The specific implementation is...

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Abstract

The invention relates to a metasurface-based code division multiplexing method for realizing multi-channel optical information coding, and belongs to the application field of micro-nano optics and holography. According to the invention, on the basis of phase regulation and control of the anisotropic unit structure of a metasurface, the design original of the metasurface structure is obtained according to a code division multiplexing iterative optimization algorithm, and then machining is guided; by using the method of the invention, under the conditions of a specific polarization state and reference light illumination, the completely independent image reconstruction function of each channel can be realized, and the information density of metasurface holography can be effectively improved; and the method can effectively improve the information density of the single metasurface, and can be applied to occasions such as dynamic holographic display, optical information storage and optical information encryption.

Description

technical field [0001] The invention relates to a multi-dimensional information multiplexing storage technology, in particular to a code division multiplexing method based on metasurface holography, which belongs to the application field of micro-nano optics and holography. Background technique [0002] Using the interference recording and diffraction reconstruction of complex light waves and reference light, holography is widely used in various directions of information optics. Holography has high redundancy and high robustness, and is one of the most potential technologies for information recording, storage and transmission. With the development of micro-nano processing technology, optical components with sub-wavelength feature size are emerging rapidly, and their specific performance promotes the further development of holography. As a representative of new micro-nano optical devices, metasurface is an ultra-thin optical element with artificial subwavelength unit structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/00G03H1/04G03H1/08
CPCG03H1/0005G03H1/0011G03H1/0443G03H1/0866G03H1/0891G03H2001/0016
Inventor 李昕黄玲玲赵睿哲魏群烁王涌天张霜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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