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Multi-dimensional imaging method and device based on composite phase metasurface

A metasurface and imaging method technology, applied in the direction of polarization influence characteristics, etc., can solve the problems of low information storage capacity and low multiplexing dimension

Active Publication Date: 2021-08-03
SHENZHEN UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a multi-dimensional imaging method and device based on a complex phase metasurface for the above-mentioned defects of the prior art, aiming at solving the problem that the metasurface in the prior art has few multiplexing dimensions and the problem of low information storage capacity

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  • Multi-dimensional imaging method and device based on composite phase metasurface
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[0044] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] First, based on the properties and applications of metasurfaces: metasurfaces are planar metamaterials composed of subwavelength-scale periodic resonant units. Metasurfaces can regulate various electromagnetic parameters such as the phase, amplitude, and polarization of the light field in a two-dimensional plane. Holography.

[0046] According to the material properties, metasurfaces can be mainly divided into metal type and dielectric type. Due to the existence of ohmic loss, the metal-type metasurface has a low regulation efficiency, and its theoretical upper limit is 25%. Co...

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Abstract

The invention provides a multi-dimensional imaging method and device based on a composite phase metasurface, wherein the method comprises the steps: scanning a unit structure based on the metasurface, and obtaining a scanning structure parameter; determining a transmission phase and a rotation angle of a phase corresponding to the unit structure according to the scanning structure parameter; and encoding the transmission phase and the rotation angle on the metasurface to obtain a multi-dimensional image. According to the invention, phase distribution of different mixed images is applied to polarized light, and spatial frequency multiplexing is combined, so that combined regulation and control of composite phases can be realized in time.

Description

technical field [0001] The invention relates to the technical field of micro-nano optical device design, in particular to a multi-dimensional imaging method and device based on a composite phase metasurface. Background technique [0002] Two-dimensional metasurfaces (hereinafter referred to as metasurfaces) are artificial optical materials that have been extensively studied in recent years. They are usually composed of periodic subwavelength resonant units and are planar metamaterials. [0003] Among them, the metasurface is sensitive to the wavelength and polarization of light waves, so the wavelength and polarization information sensed by the metasurface can be used to realize optical applications. At present, the characteristics of metasurfaces can realize the independent control and multiplexing of single-dimensional and multi-dimensional light fields. To realize the control and multiplexing of different light fields, different unit structures need to be constructed base...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/21
CPCG01N21/21
Inventor 陈书青廖世康贺炎亮谢智强陈学钰刘俊敏苏明样李瑛范滇元
Owner SHENZHEN UNIV
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