Berry phase metasurface-based multi-plane holographic multiplexing method

A multi-plane, phase-based technology, applied in the field of micro-nano optics and holographic multiplexing applications, can solve problems such as large amount of computation, small information capacity, and inability to meet the needs of practical applications

Active Publication Date: 2017-08-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the following technical problems existing in the existing holographic multiplexing technology: large crosstalk, small information capacity, large amount of calculation, unable to meet the needs of practical applications

Method used

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  • Berry phase metasurface-based multi-plane holographic multiplexing method
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  • Berry phase metasurface-based multi-plane holographic multiplexing method

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Embodiment 1: Holographic multiplexing of different reproduction positions of the same circular polarization selective channel.

[0059] like figure 1 As shown, the multi-plane holographic multiplexing method based on the Berry phase metasurface in this embodiment includes the following steps:

[0060] Step 1: Use the 3D-Fienup algorithm to achieve phase recovery, and take different values ​​for the reproduction positions of different images to obtain a computer-generated hologram (CGH) containing all information of multiple objects at different reproduction positions.

[0061]In order to verify the holographic multiplexing method of different reproduction positions of the same circular polarization selective channel, the letters A, B, C, D, E, and F created by computer graphics software are selected as target images, and obtained by the 3D-Fienup algorithm A phase-only computer-generated hologram containing information about these six images. The reproduction plane p...

Embodiment 2

[0085] Example 2: Holographic multiplexing using polarization and reproduction position as a dual multiplexing approach.

[0086] The holographic multiplexing method using polarization and reconstruction position as a dual multiplexing approach provides the possibility to double the information capacity by manipulating the polarization channel and reconstruction position corresponding to each reconstruction image.

[0087] like figure 1 As shown, the multi-plane holographic multiplexing method based on the Berry phase metasurface in this embodiment includes the following steps:

[0088] Step 1: Use the 3D-Fienup algorithm to achieve phase recovery, and take different values ​​for the reproduction positions of different images to obtain a computer-generated hologram (CGH) containing all information of multiple objects at different reproduction positions.

[0089] The Arabic numerals 1 to 8 whose image size has been preprocessed in advance are used as the target image, and 1 to...

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Abstract

The invention discloses a berry phase metasurface-based multi-plane holographic multiplexing method, and belongs to the field of micronano optical and holographic multiplexing application. The berry phase metasurface-based multi-plane holographic multiplexing method comprises the steps of achieving phase recovery by a 3D-Fienup algorithm, taking different numerical values of reproduction positions of different images, and acquiring a computer generation holographic diagram containing all information; selecting a metal coupling polaron as a berry phase metasurface structure unit, achieving phase modulation based on a berry phase modulation principle, and enabling a polarization state to become a multiplexing path by coding a holographic phase profile conjugated with an original phase to achieve a holographic multiplexing passage selected by circular polarization; making a metasurface phase sheet for recording the computer generation holographic diagram, selecting an emergent circular polarization light orthogonal to chirality of the polarization stat, and optically reproducing a three-dimensional object or a wave surface which is recorded. The holographic multiplexing method with sub-wavelength pixel of visible light and near-infrared bands, ultrathinness, large visual angle and large capacity is provided by the invention; and moreover, the crosstalk can be effectively reduced, and the holographic multiplexing of circular polarization selectivity is achieved.

Description

technical field [0001] The invention relates to a multi-plane holographic multiplexing method, in particular to a 3D-Fienup holographic multiplexing method based on Berry phase metasurfaces, and belongs to the technical field of micro-nano optics and holographic multiplexing applications. Background technique [0002] Holographic technology is a technology that uses the principles of interference and diffraction to record and reproduce the real three-dimensional image of an object. Typically, a hologram records not an image, but a series of seemingly "randomly distributed" distributions of amplitude and phase. The recording of the hologram can be obtained by the interference of the scattered light on the surface of the object and the reference beam; and the reconstruction of the hologram only needs to illuminate the hologram with the reference light wave to reconstruct the virtual three-dimensional information. In recent years, the application research based on holographic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/22
CPCG03H1/2202
Inventor 黄玲玲魏群烁王涌天李晓炜刘娟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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